CMOS Current-Mode Voltage Controller Features Ultralow start

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CMOS Current-Mode Voltage Controller Features Ultralow start

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APW38HC42A/3A/4A/5A
CMOS Current-Mode Voltage Controller
Features
Ultralow start-up current (25µA typical) operating current (2mA typical) Fast output rise/fall times
General Description
APW38HC4XA family fixed frequency, high performance, current-mode controller with drive current capability. Undervoltage lockout circuitry allows APW38HC42A APW38HC44A versions start 14.5V operate down APW38HC43A APW38HC45A versions start 8.4V with operateion down 7.6V. versions operate 24V. ultra start-up current 25µA (typical), operating current (typical) have been designed improve converter efficiency. High output driving capability 1.2A ensures fast switching minimize switching losses. APW38HC4XA features trimmed temperature compensated oscillator discharge current bandgap reference. APW38HC4XA available both 8-pin plastic packages.
-15ns rise/10ns fall
High output drive (1.2A peak current) CMOS outputs with rail-to-rail swing Current-mode operation 1MHz Trimmed bandgap reference Pin-to-pin compatible with MIC38HC4X Trimmed oscillator discharge current UVLO with hysteresis cross-conduction currents
Applications
Current-mode Off-line Switched-mode Power Supplies Current-mode DC-to-DC converters Various converters step-down, step-up, flyback forward, synchronous FET)
Description
COMP ISNS RT/CT
VREF
Ordering Marking Information
APW38HC4XA
Handling Code Temp. Range Package Code APW384XA APW38HC4XA XXXXX APW38HC4XA XXXXX Package Code Temp. Range Handling Code Tube SOP-8 Tape Reel
2/3/4/5
XXXXX Date Code
APW384XA
2/3/4/5
XXXXX Date Code
ANPEC reserves right make changes improve reliability manufacturability without notice, advise customers obtain latest version relevant information verify before placing orders. Copyright ANPEC Electronics Corp. Rev. Jan., 2003 www.anpec.com.tw
APW38HC42A/3A/4A/5A
Selection Guide
Duty Cycle 0~96% 0~50% Startup 8.4V Minimum Operating 7.6V APW38HC43A APW38HC45A Startup 14.5V Minimum Operating APW38HC42A APW38HC44A
Block Diagram
Reference
VREF
UVLO
RT/CT
Oscillator
2.5V
COMP
ISNS
Functional Description
Name Number COMP ISNS RT/CT VREF Function Description Compensation: Connect external compensation network modify error amplifier output. Feedback (Input): Error amplifier input. Feedback 2.5V desired output voltage. Current Sense (Input): Current sense comparator input. Connect current sensing resistor current transformer. Timing Resistor/Timing Capacitor: Connect external network select switching frequency. Ground: Combined analog power ground. Power Output: Totem-pole output. Analog Supply (Input): Controller circuitry supply input. Return analog ground (AGND). Reference (Output): Connect external network.
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Copyright ANPEC Electronics Corp. Rev. Jan., 2003
APW38HC42A/3A/4A/5A
Absolute Maximum Ratings
Symbol VISNS TSTG TSDR VESD Supply Voltage Current Sense Voltage Feedback Voltage Junction Temperature Range Storage Temperature Soldering Temperature Minimum Rating Parameter Rating -0.3 -0.3 300,10 Seconds Unit
Thermal Characteristics
Symbol Parameter Thermal Resistance Free Value Unit °C/W
Electrical Characteristics
=15V, Note3 RT=9.09K; CT=3.3nF; -40oC 85oC; unless noted
Symbol Parameter Test Conditions A=25°C, (Output Current)=1mA 18V, =5µA 20mA Line, Load, Temp. 10Hz 10kHz, 1000 APW38HC4XA Min. Typ. Max. 4.90 5.00 0.03 2.50 5.10 5.18 -120 Unit mV/°C %/°C 2.58
REFERENCE VOLTAGE Reference Voltage line Line Regulation load Load Regulation Temp. Stability Total Output Variation Output Noise Voltage Long Term Stability Output Short Circuit OSCILLATOR Initial Accuracy Voltage Stability Temp. Stability IDISCHG Clock Ramp Reset Current
4.82
A=25°C, Note A=25°C, RT/CT=2V RT/CT peak peak COMP=2.5V
Amplitude ERROR AMPLIFIER Input Voltage
Copyright ANPEC Electronics Corp. Rev. Jan., 2003
2.42
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APW38HC42A/3A/4A/5A
Electrical Characteristics (Cont.)
=15V, Note3 RT=9.09K; CT=3.3nF; -40oC 85oC; unless noted
Symbol ERROR Parameter Test Conditions FB=5V FB=2.7V, VCOMP =1.1V FB=2.3V, VCOMP FB=2.3V, =15k FB=2.7V, =15k VREF Notes COMP=5V, Note 18V, Note ISNS -0.5 0.01 Sourcing Current 200mA Sinking Current 200mA =25°C, L=1nF =25°C, L=1nF APW38HC42/4A 13.5 APW38HC43/5A APW38HC42/4A APW38HC43/5A APW38HC42/3A APW38HC44/5A 14.5 15.5 10.0 APW38HC4XA Min. Typ. Max. Unit
AMPLIFIER Input Bias Current Open Loop Gain Unity Gain Bandwidth PSRR Output Sink Current Output Source Current Output Voltage (High) Output Voltage (Low) CURRENT SENSE Gain Maximum Threshold PSRR IISNS Input Bias Current Delay Output OUTPUT DS(ON) High DS(ON) Rise Time Fall Time UNDERVOLTAGE LOCKOUT DD(ST) Start Threshold DD(MIN) Minimum Operating Voltage PULSE WIDTH MODULATOR Maximum Duty Cycle Minimum Duty Cycle
3.15
2.85
TOTAL STANDBY CURRENT DD=13V, APW38HC42/4A DD=7.5V, APW38HC43/5A IDD(OP) Operating Supply Current ISNS= =1nF Note Parameter measured trip point latch with VFB=0V. IDD(ST) Start-Up Current
Note Gain defined VCOMP 0<VTH(ISNS)<0.8V VTH(ISNS)
Note Adjust above start threshold before setting 15V. Note Output frequency equals oscillator frequency APW38HC42A APW38HC43A. Output frequency APW38HC44A APW38HC45A equals half oscillator frequency.
Copyright ANPEC Electronics Corp. Rev. Jan., 2003 www.anpec.com.tw
APW38HC42A/3A/4A/5A
Typical Characteristics
Oscillator Frequency Configuration
Output Dead Time Oscillator Frequency
Resistance
Output Dead Time
10nF 4.7nF
1.8nF
200pF 470pF
1000
1000
Oscillator Frequency (kHz)
Oscillator Frequency (kHz)
Oscillator Discharge Current Temperature
Oscillator Discharge Current (mA)
Current Sense Amplifier Threshold Error Amplifier Output
Current Sense Threshold
-50oC 25oC
VRTCT
Temperature (°C)
Error Amplifier Output
Copyright ANPEC Electronics Corp. Rev. Jan., 2003
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APW38HC42A/3A/4A/5A
Typical Characteristics (Cont.)
Short-Circuit Current VREF Temperature
Output Waveform
VREF Short-Circuit Current (mA)
Output Voltage
Temperature (°C)
Time (µs)
Open Loop test Circuit
4.7K 2222
rror djust 100K djust
utput
4.7K
Copyright ANPEC Electronics Corp. Rev. Jan., 2003
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APW38HC42A/3A/4A/5A
Packaging Information
PDIP-8 Reference JEDEC Registration MS-001)
Millimeters Min. 0.38 2.92 9.02 2.54BSC 0.36 1.14 7.62 8.26 6.10 2.92 7.11 10.92 3.81 0.240 0.115 0.56 1.78 0.014 0.045 Max. 5.33 3.68 10.16 Min. 0.015 0.115 0.355
Inches Max. 0.210 0.145 0.400 0.100BSC 0.022 0.070 0.300 0.325 0.280 0.430 0.150
Copyright ANPEC Electronics Corp. Rev. Jan., 2003
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APW38HC42A/3A/4A/5A
Package Information
SOP- Reference JEDEC Registration MS-012)
0.015X45
0.004max.
imeter
Copyright ANPEC Electronics Corp. Rev. Jan., 2003
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APW38HC42A/3A/4A/5A
Physical Specifications
Terminal Material Lead Solderability Solder-Plated Copper (Solder Material 90/10 63/37 SnPb) Meets Specification RSI86-91, ANSI/J-STD-002 Category
Reflow Condition
(IR/Convection Reflow)
Reference JEDEC Standard J-STD-020A APRIL 1999
temperature
Peak temperature
183°C Pre-heat temperature
Time
Classification Reflow Profiles
Convection Convection Average ramp-up rate(183°C Peak) 3°C/second max. seconds Preheat temperature 25°C) seconds Temperature maintained above 183°C Time within actual peak temperature seconds Peak temperature range +5/-0°C +5/-0°C Ramp-down rate /second max. minutes max. Time 25°C peak temperature /second max.
seconds 215-219°C +5/-0°C /second max.
Package Reflow Conditions
pkg. thickness 2.5mm bgas Convection +5/-0 215-219 IR/Convection +5/-0 pkg. thickness 2.5mm pkg. volume pkg. thickness 2.5mm pkg. volume Convection +5/-0 +5/-0 IR/Convection +5/-0
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Copyright ANPEC Electronics Corp. Rev. Jan., 2003
APW38HC42A/3A/4A/5A
Reliability test program
Test item SOLDERABILITY HOLT Latch-Up Method MIL-STD-883D-2003 MIL-STD-883D-1005.7 JESD-22-B, A102 MIL-STD-883D-1011.9 MIL-STD-883D-3015.7 JESD Description 245°C 1000 Bias Hrs, 121°C -65°C 150°C, Cycles VHBM 2KV, 200V 10ms 100mA
Carrier Tape Reel Dimensions
Application
SOP-8 Application SOP-8
330±1
12.75
12.4 +0.2
5.2±
1.75±
1.55±0.1 1.5+ 0.25
2.1± 0.3±0.013
(mm)
Copyright ANPEC Electronics Corp. Rev. Jan., 2003 www.anpec.com.tw
APW38HC42A/3A/4A/5A
Cover Tape Dimensions
Application SOP- Carrier Width Cover Tape Width Devices Reel 2500
Customer Service
Anpec Electronics Corp. Head Office Li-Hsin Road, SBIP, Hsin-Chu, Taiwan, R.O.C. 886-3-5642000 886-3-5642050 Taipei Branch 137, Lane 235, Chiao Rd., Hsin Tien City, Taipei Hsien, Taiwan, 886-2-89191368 886-2-89191369
Copyright ANPEC Electronics Corp. Rev. Jan., 2003
www.anpec.com.tw

CMOS Current-Mode Voltage Controller Features Ultralow start

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