BIPOLAR Switching Regulator Controller Channels plus High-Pr

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BIPOLAR Switching Regulator Controller Channels plus High-Pr

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DS04-27208-4Ea
BIPOLAR
Switching Regulator Controller
Channels plus High-Precision, High-Frequency Capabilities)
MB3785A
DESCRIPTION
MB3785A PWM-based 4-channel switching regulator controller featuring high-precision, high-frequency capabilities. four channels circuits allow their outputs three modes: step-down, step-up, inverted. third fourth channels suited motor speed control. triangular-wave oscillation circuit accepts ceramic resonator, addition standard method oscillation using network.
FEATURES
Wide range operating power supply voltages: current consumption: [Typ] when operating10 less during standby Built-in high-precision reference voltage generator: 2.50 V±1% Oscillation circuit Capable high-frequency oscillation: Also accepts ceramic resonator. Wide input range error amplifier: -0.2 VCC-1.8 Built-in timer/latch-actuated short-circuiting detection circuit Output circuit drive output transistors totem-pole type allowing on-current off-current values independently. (Continued)
PACKAGE
48-pin, Plastic LQFP
(FPT-48P-M05)
Copyright©2003-2008 FUJITSU MICROELECTRONICS LIMITED rights reserved 2003.8
MB3785A
(Continued) Adjustable dead time over entire duty ratio range Built-in standby output control functions High-density mounting possible: 48-pin LQFP package
ASSIGNMENT
(TOP VIEW) OUT1 OUT2 OUT3 OUT4
VCC2
DTC1 -IN1 +IN1 -IN1 DTC2 -IN2 +IN2
DTC4 -IN4 +IN4 -IN4 DTC3 -IN3 +IN3
-IN2(C) OSCOUT OSCIN
VCC1
VREF
CTL2 CTL1 CTL3 -IN3
(FPT-48P-M05)
Note alphabetic characters parenthesis indicate following input pins. comparator error
MB3785A
DESCRIPTION
Symbol +IN1(E) -IN1(E) -IN1(C) DTC1 OUT1 +IN2(E) -IN2(E) -IN2(C) DTC2 OUT2 +IN3(E) -IN3(E) -IN3(C) DTC3 OUT3 +IN4(E) -IN4(E) -IN4(C) Description output transistor OFF-current setting terminal. Insert capacitor between terminals, then output transistor OFF-current. error non-inverted input terminal. error inverted input terminal. error output terminal. comparator inverted input terminal. dead time control terminal. output current setting terminal. totem-pole output terminal. output transistor OFF-current setting terminal. Insert capacitor between terminals, then output transistor OFF-current. error non-inverted input terminal. error inverted input terminal. error output terminal. comparator inverted input terminal. dead time control terminal. output current setting terminal. totem-pole output terminal. output transistor OFF-current setting terminal. Insert capacitor between terminals, then output transistor OFF-current. error non-inverted input terminal. error inverted input terminal. error output terminal. comparator inverted input terminal. dead time control terminal. output current setting terminal. totem-pole output terminal. output transistor OFF-current setting terminal. Insert capacitor between terminals, then output transistor OFF-current. error non-inverted input terminal. error inverted input terminal. error output terminal. comparator inverted input terminal. (Continued)
MB3785A
(Continued) Triangular-Wave Oscillator Circuit
Symbol DTC4 OUT4 OSCIN OSCOUT VCC1 VCC2 VREF
Description dead time control terminal. output current setting terminal. totem-pole output terminal. This terminal connects ceramic resonator. This terminal connects resistor setting triangular-wave frequency. This terminal connects capacitor setting triangular-wave frequency. Power supply terminal reference power supply control circuit. Power supply terminal output circuit. terminal. Reference voltage output terminal. This terminal connects capacitor short-circuit protection circuit. Power supply circuit control terminal.
Power Supply Circuit
Control Circuit
CTL1
When this High, power supply circuit first channel active state. When this Low, power supply circuit first channel standby state. control terminal. While CTL1 terminal High
CTL2
When this High, second channel active state. When this Low, second channel inactive state. control terminal. While CTL1 terminal High
CTL3
When this High, third fourth channels active state. When this Low, third fourth channels inactive state.
MB3785A
BLOCK DIAGRAM
Error
+IN1 -IN1 -IN1 DTC1
VREF
Comparator
Comparator
VREF
comparator
Current Setting
VCC2
OUT1
Error
+IN2 -IN2 -IN2 DTC2
VREF
comparator
Comparator
Comparator
VREF
Current Setting
OUT2
Error
+IN3 -IN3 -IN3 DTC3
Comparator
comparator
Current Setting
OUT3
Error
+IN4 -IN4 -IN4 DTC4
Comparator
comparator
Current Setting
OUT4
Comparator
CTL2 CTL3
Comparator
-1.9 -1.3
Ref. Power Supply Vol. Circuit Channel Circuit Control
VCC1 CTL1
VREF Latch
Under Voltage Lock-out Protection Circuit Triangular-Wave Oscillator Circuit
OSCIN
VREF
OSCOUT Ceramic Resonator
MB3785A
FUNCTIONAL DESCRIPTION
Switching Regulator Function
Reference voltage circuit reference voltage circuit generates temperature-compensated reference voltage 2.50 using voltage supplied from power supply terminal (pin 18). This voltage used operating power supply internal circuits reference voltage also supplied external device from VREF terminal (pin 19). Triangular-wave oscillator circuit connecting timing capacitor resistor (pin (pin terminals, possible generate desired triangular oscillation waveform. oscillation also obtained using ceramic resonator connected pins This waveform amplitude input internal comparator same time, also supplied external device from terminal (pin 17). Error amplifier This amplifier detects output voltage switching regulator outputs control signal accordingly. wide common-mode input voltage range from -0.2 -1.8 allows easy setting from external power supply, making system suitable motor speed control. connecting feedback resistor capacitor from error amplifier output inverted input pin, form desired loop gain, stable phase compensation. comparator comparators these channels voltage comparator with inverted input non-inverted input, that voltage-pulse width converter control output pulse on-time according input voltage. turns output transistor when triangular wave from oscillator higher than both error amplifier output DTC-pin voltages. comparators these channels voltage comparator with inverted input non-inverted inputs, that voltage-pulse width converter control output pulse on-time according input voltage. turns output transistor when triangular wave from oscillator lower than both error amplifier output DTC-pin voltages. These four channels provided with soft start function using pin. Output circuit output circuit comprised totem-pole configuration drive transistor Max)
MB3785A
Channel Control Function
MB3785A allows four channels power supply circuits controlled independently. voltage levels CTL1 (pin 20), CTL2 (pin 21), CTL3 (pin terminals turn circuit each channel "ON" "OFF", listed below. Table Channel Channel On/Off Setting Conditions. voltage level On/Off state channel CTL1 CTL2 CTL3 Standby state* Power supply circuit
power supply current value during standby less.
Protective Functions
Timer/latch-actuated short-circuiting protection circuit comparator checks output voltage each comparator which used detect short-circuiting output. When these comparators have output voltage greater than equal timer circuit activated protection enable capacitor externally fitted terminal (pin begins charge. comparator's output voltage restored normal voltage level time capacitor voltage risen base-emitter junction voltage transistor, i.e., 0.65 latch circuit activated turn output transistor while same time setting duty (OFF) When actuated, this protection circuit reset turning power supply again. Under voltage lockout protection circuit transient state power-on momentary drop power supply voltage causes control malfunction, resulting system breakdown deterioration. detecting internal reference voltage with respect power supply voltage, this protection circuit resets latch circuit turn output transistor duty (OFF) while same time holding terminal (pin "L". reset cleared when power supply voltage becomes greater than equal threshold voltage level this protection circuit.
MB3785A
ABSOLUTE MAXIMUM RAGINGS (See WARNING)
+25°C) Parameter Power supply voltage Control input voltage Power dissipation Operating ambient temperature Storage temperature Symbol VICTL Tstg Conditions +25°C Rating 550* Unit
packages mounted epoxy board cm). WARNING: Semiconductor devices permanently damaged application stress (voltage, current, temperature, etc.) excess absolute maximum ratings. exceed these ratings.
RECOMMENDED OPERATING CONDITIONS
+25°C) Parameter Power supply voltage* Error amp. input voltage Comparator input voltage Control input voltage Output current Timing capacitance Timing resistance Oscillation frequency Operating ambient temperature Symbol VICTL fOSC Conditions Value -0.2 -0.2 -0.2 -0.8 1500 1000 Unit
minimum value recommended supply voltage except when device operates with constant output sink current. WARNING: recommended operating conditions required order ensure normal operation semiconductor device. device's electrical characteristics warranted when device operated within these ranges. Always semiconductor devices within their recommended operating condition ranges. Operation outside these ranges adversely affect reliability could result device failure. warranty made with respect uses, operating conditions, combinations represented data sheet. Users considering application outside listed conditions advised contact their representatives beforehand.
MB3785A
ELECTRICAL CHARACTERISTICS
(VCC +25°C) Value Unit 2.500 ±0.2 2.72 2.60 2.50 -100 0.65 -100 0.65 -1.0 2.525 2.55 0.72 VCC-0.8 0.70 -0.6
Parameter Reference voltage Reference voltage block Rate changed output voltage Temperature Input stability Load stability Sort-circuit output current Under voltage lockout protection circuit (U.V.L.O) Threshold voltage Hysteresis width Reset voltage (VCC) Input threshold voltage Input bias current Input voltage range Input offset voltage Input bias current Common mode input voltage range Threshold voltage Input standby voltage Input latch voltage Input source current Oscillation frequency Frequency stability (VCC)
Symbol VREF VREF /VREF Line Load VHYS VICM VtPC VSTB Ilbpc fOSC f/fdv f/fdT
Conditions -30°C +85°C -0.1 VREF
2.475 2.45 -200 -0.2 0.58 -200 -0.2 0.60 -1.4
Short-circuit detection comparator Short circuit detection block
Triangular waveform oscillator block
3/CH
Frequency stability (Ta)
-30°C +85°C
(Continued)
MB3785A
(Continued) Parameter Input offset voltage Error amplifier Input bias current Common mode input voltage range Voltage gain Frequency bandwidth dead dead time control time control circuit circuit Input threshold voltage Input bias current Latch mode source current Latch input voltage Input threshold voltage Input bias current Latch mode source current Latch input voltage Threshold voltage Input current Source current Output block Sink current Output leakage current Standby current Supply current when output Symbol VICM Vt100 IIbdt IIdt VIdt Vt100 IIbdt IIdt VIdt ICC0 VCTL VCTL Duty cycle Duty cycle Duty cycle Duty cycle Conditions (VCC +25°C) Value Unit -100 -500 VCC-0.8 2.25 2.25
-200 -0.2 1.05
VREF-0.3
1.05
General
Channel control block
MB3785A
TYPICAL CHARACTERISTIC CURVES
Supply current Supply voltage
+25°C
Reference voltage Supply voltage
Ta=+25°C
CTL1, CTL1,
Reference voltage VREF
Supply current (mA)
CTL1
Supply voltage
Supply voltage
Reference voltage Output current setting voltage Supply voltage
+25°C VREF
Reference voltage Ambient temperature
Voltage Output Current Setting
2.56 2.54 VCTL1,
Reference voltage VREF
Reference voltage VREF
2.52 2.50 2.48 2.46 2.44
Supply voltage
Ambient temperature (°C)
Reference voltage Control voltage
Control current Control voltage
+25°C
Reference voltage VREF
Control voltage VCTL1
Control current ICTL1 (µA)
+25°C
Control voltage VCTL1
(Continued)
MB3785A
(Continued)
Triangular wave maximum amplitude voltage Timing capacitance
Triangular wave maximum amplitude voltage VMAX Triangular wave frequency fOSC (Hz)
Triangular wave frequency Timing resistance
+25°C
+25°
Timing capacitance (pF)
15000
1500
Triangular wave cycle Timing capacitance
Triangular wave cycle TOSC (µs)
Timing resistance
+25°C
Duty Triangular wave frequency
Duty
+25°C
Timing capacitance (pF)
Triangular wave frequency (Hz)
Rate change triangular wave frequency Ambient temperature (Not using ceramic resonator)
Rate change triangular Wave frequency Rate change triangular Wave frequency
Rate change triangular wave frequency Ambient temperature (Using ceramic resonator)
fOSC
fOSC
Ambient temperature (°C)
Ambient temperature (°C)
(Continued)
MB3785A
(Continued)
Gain Frequency Phase Frequency
+25°C
Error maximum output voltage Frequency
Error maximum output voltage amplitude
Frequency (Hz)
+25°C
Phase (deg)
Gain (dB)
Triangular wave frequency fOSC (Hz)
[Measuring Circuit]
Error
Power dissipation Ambient temperature
1000 Power dissipation (mW) LQFP
Ambient temperature (°C)
MB3785A
METHODS SETTING OUTPUT VOLTAGE
Method Connecting CH2: When Output Voltage (VO) Positive
VREF VOUT+
VREF
Method Connecting CH2: When Output Voltage (VO) Negative
VREF VREF VREF
VOUT-
MB3785A
Method Connecting CH4: When Output Voltage (VO) Positive
VREF VOUT
VREF
Method Connecting CH4: When Output Voltage (VO) Negative
VREF VREF VREF
VOUT-
MB3785A
METHOD SETTING OUTPUT CURRENT
output circuit comprised totem-pole configuration. output current waveform such that ONcurrent value constant current OFF-current value time constant shown Figure These output currents using equations below. ON-current 2.5/RE (Voltage output current-setting OFF-current time constant proportional value
Figure Output Circuit
Drive transistor
Figure Output Current Waveform
ON-current OFF-current OFF-current setting block Output current
OFF-current
ON-current
Figure Voltage Current Waveforms Output (CH1)
Figure Measuring Circuit Diagram
1000
MB3785A
MB3785A
METHOD SETTING TIME CONSTANT TIMER/LATCH-ACTUATED SHORT-CIRCUTING PROTECTION CIRCUIT
Figure schematically shows protection latch circuit. outputs from output-shorting detection comparators respectively connected inverted inputs comparator. These inputs always compared with reference voltage approximately which non-inverted input comparator. While switching regulator load conditions stable, there changes outputs comparators that short-circuit protection control keeps equilibrium state. this time, voltage terminal (pin held approximately When load conditions change rapidly short-circuiting load, example, output voltage comparator relevant channel goes (2.1 more). Consequently, comparator outputs "L", causing transistor turn off, short-circuit protection capacitor (externally fitted terminal) begins charge. 10-6/CPE 0.65 10-6/CPE tPE/0.6 When external capacitor charged approximately 0.65 latch output drive transistor turned off. Simultaneously, dead time extended 100% output voltage terminal (pin held "L". result, latch input closed discharged.
Figure Protection Latch Circuit
Comparator Comparator Comparator Comparator
comparator
Latch
U.V.L.O
MB3785A
TREATMENT WHEN USING
When timer/latch-actuated short-circuiting protection circuit, connect terminal (pin with shortest distance possible. Also, connect comparator's input terminal each channel VCC1 terminal (pin 18).
Figure Treatment When Using
VCC1
-IN1
-IN2
-IN3
-IN4
OSCILLATOR FREQUENCY SETTING
oscillator frequency connecting timing capacitor (CT) terminal (pin timing resistor (RT) terminal (pin 16). Oscillator frequency: fosc
fosc (kHz) 930000 CT(pF) RT(k)
MB3785A
METHOD SETTING TRIANGULAR-WAVE OSCILLATOR CIRCUIT
When Using Ceramic Resonator
Connect OSCIN terminal (pin leave OSCOUT terminal (pin open. This makes possible oscillation frequency with only
Figure When Using Ceramic Resonator
OSCIN
OSCOUT
Open
When Using Ceramic Resonator
connecting ceramic resonator between OSCIN OSCOUT shown below, oscillation frequency. this case, too, required. Determine values that oscillation frequency this network about lower than that ceramic resonator.
Figure When Using Ceramic Resonator
OSCIN Ceramic resonator
OSCOUT
MB3785A
<Precautions> When oscillation rise time power switch-on compared between ceramic crystal resonator, known that crystal resonator about times slower rise than ceramic resonator. Therefore, when crystal resonator used, system operation switching regulator power switch-on becomes unstable. avoid this problem, recommended that ceramic oscillator because short rise time and, hence, ensures stable operation. Crystal Resonator Turn-on Characteristic
(ms)
Ceramic Resonator Turn-on Characteristic
(ms)
MB3785A
METHOD SETTING DEAD TIME
When device step-up inverted output based flyback method, output transistor fixed full-on state (ON-duty power switch-on. prevent this problem, determine voltages terminals (pins from VREF voltage easily output transistor's dead time (maximum ON-duty) independently each channel shown below. Channels When voltage terminals (pins higher than triangular-wave output voltage from oscillator, output transistor turns off. dead time calculation formula assuming that triangular-wave amplitude triangular-wave minimum voltage given below. Duty (OFF) [%], VREF
When these terminals, connect them GND.
Figure When Using Dead Time
Figure When Using
VREF
DTC1 (DTC2)
DTC1 (DTC2)
Channels When voltage terminals (pins lower than triangular-wave output voltage from oscillator, output transistor turns off. dead time calculation formula assuming that triangular-wave amplitude triangular-wave maximum voltage given below. Duty (OFF) -Vdt [%], VREF
When these terminals, connect them VREF.
MB3785A
Figure When Using Dead Time
Figure When Using
VREF
VREF
DTC3 (DTC4)
DTC3 (DTC4)
<Precautions> When ceramic resonator, attention when setting dead time because triangular-wave amplitude determined values
MB3785A
METHODS SETTING SOFT START TIME
prevent surge currents when turned soft start using terminal (pin 33). When power switched channels begin discharging capacitor (Cdt) connected DTC1 (DTC2) terminal, channels begin charging capacitor (Cdt) connected DTC3 (DTC4) terminal. soft start process operates comparing soft start setting voltage, which proportional terminal voltage, with triangular waveform, varying ON-duty terminal (pin 39). soft start time until duty reaches determined following equation: figure Soft start time (time until output duty 50%)
0.446
figure Soft start time (time until output duty 50%)
1.022
Figure Setting Soft Start
Figure Setting Soft Start
VREF DTC1 (DTC2)
VREF
DTC3 (DTC4)
MB3785A
also possible soft start simultaneously with dead time configuring terminals shown below. figure Soft start time (time until output duty 50%)
(0.64 0.36R2
figure Soft start time (time until output duty 50%)
2.5R2
Figure Setting Dead Time Soft Start
Figure Setting Dead Time Soft Start
VREF DTC1 (DTC2)
VREF
DTC3 (DTC4)
MB3785A
APPLICATION
Equivalent series resistor stability smoothing capacitor
equivalent series resistor (ESR) smoothing capacitor DC/DC converter greatly affects loop phase characteristic. stability system improved that phase characteristic advance phase ideal capacitor high frequency region (see "Gain Frequency" "Phase Frequency"). smoothing capacitor with reduces system stability. care when using electrolytic capacitors (OS-CONTM) tantalum capacitors. Note: OS-CON trademark Sanyo Electnic Co., Ltd. DC/DC Converter Basic Circuit
Gain Frequency
Phase Frequency
Phase (deg)
Gain (dB)
-180
Frequency (Hz)
Frequency (Hz)
MB3785A
Reference data aluminum electrolytic smoothing capacitor replaced with electrolytic capacitor (OS-CON: phase margin reduced half (see Fig. 18). DC/DC Converter characteristic Test Circuit
VOUT
characteristic Between these points
VREF/2 Error Amp.
Figure DC/DC Converter output Gain Phase
Gain (dB)
Phase (deg)
Capacitor fOSC
-180
Figure DC/DC Converter output Gain Phase
Gain (dB)
Phase (deg)
OS-CON22 fOSC
-180
Frequency (Hz)
MB3785A
EXAMPLE APPLICATION CIRCUIT
1000
1000
1000
1000
1000 Motor Control Signal
motor
1000
Motor Control Signal
1000
motor
1000
VREF Ceramic Resonator Output Control Signals CTL1 CTL2 CTL3
MB3785A
NOTES
Take account common impedance when designing earth line printed wiring board. Take measures against static electricity. semiconductors, antistatic conductive containers. When storing carrying printed circuit board after chip mounting, conductive container. work table, tools measuring instruments must grounded. worker must grounding device containing resistors series. apply negative voltage Applying negative voltage -0.3 less generate parasitic transistor, resulting malfunction.
ORDERING INFORMATION
Part number MB3785APFV Package 48-pin plastic LQFP (FPT-48P-M05) Remarks
MB3785A
PACKAGE DIMENSION
48-pin Plastic LQFP (FPT-48P-M05)
9.00±0.20(.354±.008)SQ *7.00 -0.10 (.276 -.004
+0.40 +.016
Note These dimensions include resin protrusion. Note Pins width pins thickness include plating thickness. Note Pins width include cutting remainder.
0.145±0.055 (.006±.002)
0.08(.003) INDEX
Details part 1.50 -0.10 .059 -.004
+0.20 +.008
(Mounting height)
0°~8° LEAD 0.50(.020)
0.10±0.10 (.004±.004) (Stand off)
0.20±0.05 (.008±.002)
0.08(.003)
0.50±0.20 (.020±.008) 0.60±0.15 (.024±.006)
0.25(.010)
2002 FUJITSU LIMITED F48013S-c-6-10
Dimensions (inches) Note values parentheses reference values.
MB3785A
MEMO
MB3785A
MEMO
FUJITSU MICROELECTRONICS LIMITED
Shinjuku Dai-Ichi Seimei Bldg. 7-1, Nishishinjuku 2-chome, Shinjuku-ku, Tokyo 163-0722, Japan Tel: +81-3-5322-3347 Fax: +81-3-5322-3387 http://jp.fujitsu.com/fml/en/ further information please contact: North South America FUJITSU MICROELECTRONICS AMERICA, INC. 1250 Arques Avenue, Sunnyvale, 94085-5401, U.S.A. Tel: +1-408-737-5600 Fax: +1-408-737-5999 http://www.fma.fujitsu.com/ Europe FUJITSU MICROELECTRONICS EUROPE GmbH Pittlerstrasse 63225 Langen, Germany Tel: +49-6103-690-0 Fax: +49-6103-690-122 Korea FUJITSU MICROELECTRONICS KOREA LTD. KOSMO TOWER, 1002 Daechi-Dong, Kangnam-Gu,Seoul 135-280 Korea Tel: +82-2-3484-7100 Fax: +82-2-3484-7111 http://www.fmk.fujitsu.com/ Asia Pacific FUJITSU MICROELECTRONICS ASIA LTD. Lorong Chuan, #05-08 Tech Park, Singapore 556741 Tel: +65-6281-0770 Fax: +65-6281-0220 FUJITSU MICROELECTRONICS SHANGHAI CO., LTD. Rm.3102, Bund Center, No.222 Road(E), Shanghai 200002, China Tel: +86-21-6335-1560 Fax: +86-21-6335-1605 http://cn.fujitsu.com/fmc/ FUJITSU MICROELECTRONICS PACIFIC ASIA LTD. 10/F., World Commerce Centre, Canton Road Tsimshatsui, Kowloon Hong Kong Tel: +852-2377-0226 Fax: +852-2376-3269 http://cn.fujitsu.com/fmc/tw
Rights Reserved. contents this document subject change without notice. Customers advised consult with sales representatives before ordering. information, such descriptions function application circuit examples, this document presented solely purpose reference show examples operations uses FUJITSU MICROELECTRONICS device; FUJITSU MICROELECTRONICS does warrant proper operation device with respect based such information. When develop equipment incorporating device based such information, must assume responsibility arising such information. FUJITSU MICROELECTRONICS assumes liability damages whatsoever arising information. information this document, including descriptions function schematic diagrams, shall construed license exercise intellectual property right, such patent right copyright, other right FUJITSU MICROELECTRONICS third party does FUJITSU MICROELECTRONICS warrant non-infringement third-party's intellectual property right other right using such information. FUJITSU MICROELECTRONICS assumes liability infringement intellectual property rights other rights third parties which would result from information contained herein. products described this document designed, developed manufactured contemplated general use, including without limitation, ordinary industrial use, general office use, personal use, household use, designed, developed manufactured contemplated accompanying fatal risks dangers that, unless extremely high safety secured, could have serious effect public, could lead directly death, personal injury, severe physical damage other loss (i.e., nuclear reaction control nuclear facility, aircraft flight control, traffic control, mass transport control, medical life support system, missile launch control weapon system), requiring extremely high reliability (i.e., submersible repeater artificial satellite). Please note that FUJITSU MICROELECTRONICS will liable against and/or third party claims damages arising connection with above-mentioned uses products. semiconductor devices have inherent chance failure. must protect against injury, damage loss from such failures incorporating safety design measures into your facility equipment such redundancy, fire protection, prevention over-current levels other abnormal operating conditions. Exportation/release products described this document require necessary procedures accordance with regulations Foreign Exchange Foreign Trade Control Japan and/or export control laws. company names brand names herein trademarks registered trademarks their respective owners.
Edited Strategic Business Development Dept.

BIPOLAR Switching Regulator Controller Channels plus High-Pr

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