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UC3842AQTR Texas Instruments 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PQCC20, PLASTIC, LCC-20 visit Texas Instruments
UC3842D8 Texas Instruments Current-Mode PWM Controller 8-SOIC 0 to 70 visit Texas Instruments Buy
UC3842AD Texas Instruments Current Mode PWM Controller 14-SOIC 0 to 70 visit Texas Instruments Buy
UC3842AN Texas Instruments Current Mode PWM Controller 8-PDIP 0 to 70 visit Texas Instruments Buy
UC3842D8TRG4 Texas Instruments 1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-8 visit Texas Instruments
UC3842AD8TR Texas Instruments Current Mode PWM Controller 8-SOIC 0 to 70 visit Texas Instruments

uc3842 theory of pin diagram

Catalog Datasheet MFG & Type PDF Document Tags

Switching Power Supply Schematic Diagram uc3842

Abstract: schematic diagram 48v regulator uc3842 ENABLE pin rises above 2.1V and off when below 2.0V. The SHUTDN pin provides added protection by shutting off the IC when greater than 1.5V is present on the pin. The pulse by pulse current limit of 1V , the output section as part of the control loop. This allows parallel operation of several modules , can see the various functions of the UC3828. Substitution of parts will result in a design which may suit other requirements. To more fully understand the design and specifications of this demo board
Unitrode
Original
U-147 Switching Power Supply Schematic Diagram uc3842 schematic diagram 48v regulator uc3842 Snubber circuits theory 12V DC to 1.5v dC converter schematic diagram uc3842 theory of pin diagram Snubber circuits theory, design and application U DN-55 UC3907 UC3842

uc3842 theory of pin diagram

Abstract: irf840 uc3842 such feature is a sawtooth current flowing out of the feedback pin (FB), which provides a slope , features similar to the UC3842 (please refer to UC3842 Comparison Section). BLOCK DIAGRAM VCC ICT , duty cycle of the output signal is typically 89%. GROUND PIN (GND) This pin provides ground return for the IC. OVERVOLTAGE PROTECTION INPUT PIN (OVP) This pin provides a means of turning off the external transistor drive output independent of the PWM loop. This pin is normally used for overvoltage
TOKO
Original
IEC1000-3-2 TK75003 irf840 uc3842 boost uc3842 application note UC3842 boost converter CT 1975 circuit uc3842 battery charger pulse powersystems TK75005D TK75005 0798O0

irf840 uc3842

Abstract: uc3842 theory of pin diagram feature is a sawtooth current flowing out of the feedback pin (FB), which provides a slope compensation , ) This pin drives the external MOSFET with a totem pole output stage capable of sinking or sourcing a peak current of about 1 A. In standby mode, the DRV pin can sink about 5 mA while keeping the drive , on by leakage currents. The maximum duty cycle of the output signal is typically 89%. GROUND PIN , frequency as measured at the DRV pin. As the frequency of operation increases above 200 kHz, the maximum
TOKO
Original
uc3842 power factor UC3842 mosfet driver power supply with uc3842 1N4148 ETD-29 HFA04TB60

irf840 uc3842

Abstract: uc3842 theory of pin diagram flowing out of the feedback pin (FB), which provides a slope compensation ramp (in current mode , pin drives the external MOSFET with a totem pole output stage capable of sinking or sourcing a peak current of about 1 A. In standby mode, the DRV pin can sink about 5 mA while keeping the drive pin pulled , currents. The maximum duty cycle of the output signal is typically 89%. GROUND PIN (GND) This pin provides ground return for the IC. OVERVOLTAGE PROTECTION INPUT PIN (OVP) This pin provides a means of turning off
TOKO
Original

UC3842 smps design

Abstract: ferrite core transformer calculation formula driving circuit as been modeled with the equivalent schematic diagram of the transformer with its , made on the following steps are related to the complete schematic diagram of the realized demo board , of our project is to have f=50kHz and MAX=75%, from the datasheet of the UC3842 we can set: R15 , Vcc at start-up determines (R1+R2) value. The UC3842 has a start-up threshold of 16V, therefore the , supply UC3842 till the steady-state behavior of the converter is established. This time, from bench
STMicroelectronics
Original
AN1889 BY259 UC3842 smps design ferrite core transformer calculation formula UC3842 smps project uc3845 smps transformer winding formula step down STC03DE170 F-400V F-2000V F-100V F-50V

ic 3842 datasheet

Abstract: AS3842 Figure 1. Block Diagram of the AS3842/3/4/5 Pin Function Description Pin Number Function , which are pin compatible with the industry standard UC3842 series of devices. Suitable for many switch , ICs provide pin-for-pin replacement of the industry standard UC3842 series of devices. The devices , 69 500 AS384x Current Mode Controller Application Information Section 1 ­ Theory of , power supply manufacturing tolerances. The functional block diagram of the AS3842 is shown in Figure
Astec Semiconductor
Original
ic 3842 datasheet PWM IC 8 PIN DIP 3842 AS3844 application notes AS3842 pin diagram of ic 3843 PIN CONFIGURATION OF IC 3844 AS384 AS3842/3 AS3844/5

ferrite core transformer calculation formula

Abstract: UC3842 smps project been modeled with the equivalent schematic diagram of the transformer with its secondary closed with a , of ESBT and supervise the fly-back operations requested by the converter. The common UC3842 provides , schematic diagram of the realized demo board reported in figure 9. 1. Primary side regulation. It can be , datasheet of the UC3842 we can set: R15=2.2k C6=15nF 4. Current sensing and limiting. Since the , . Being under-voltage threshold of UC3842 8.5V, the voltage across C 4 must always be over 8.5V during
STMicroelectronics
Original
uc3842 smps Power Supply Schematic Diagram pcb design on uc3842 design of mosfet based power supply uc 3842 TRANSISTOR R2W flyback transformer design uc3842 SMPS CIRCUIT DIAGRAM UC3842 F-25V 1N4007 BA159 STBYW81P200 SRW2924ED-E02V015 UC3842A

Monitor switched mode Power supply 3842 PWM

Abstract: astec 3842 Diagram of the AS3842/3/4/5 Pin Function Description Pin Number Function Description 1 COMP , which are pin compatible with the industry standard UC3842 series of devices. Suitable for many switch , The AS3842 family of control ICs provide pin-for-pin replacement of the industry standard UC3842 , 9 500 AS384x Current Mode Controller Application Information Section 1 Ð Theory of , power supply manufacturing tolerances. The functional block diagram of the AS3842 is shown in Figure
Astec Semiconductor
Original
Monitor switched mode Power supply 3842 PWM astec 3842 AS3842 equivalent 8 pin ic 3844 for 5 volts AS3843 astec as3842

hy 3842

Abstract: Astec Semiconductor as3842 , high performance controllers which are pin compatible with the industry standard UC3842 series of , 1- Theory of Operation The functional block diagram of the AS3842 is shown in Figure 01. The IC is , provide pin-for-pin replacement of the industry standard UC3842 series of devices. The devices are , AS3843/5 requires less than 0.5 mA of start-up current over the full temperature range. Pin , /5D-8 57 AS3842/3/4/5 Current M ode Controller Figure 1 . Block Diagram of the AS3842/3/4/5
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hy 3842 Astec Semiconductor as3842 ic 3843 external 0736 regulator PWM IC 8 PIN DIP 3843 3842 boost converter

AS3842 equivalent

Abstract: application notes AS3842 replacement of the industry standard UC3842 series of devices. The devices are redesigned to provide signifi , Current Mode Controller Pin Function Description Pin Number 1 Function COMP Figure 1. Block Diagram of the AS3842/3/4/5 Description This pin is the error amplifier output. Typically used to provide , ASTEC Semiconductor 63 AS3842/3/4/5 Current Mode Controller Section 1- Theory of Operation The functional block diagram of the AS3842 is shown in Figure 01. The IC is comprised of the six basic
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AS3842 Application Note uc3842 constant current 3844 pwm circuits ASTEC RF modulator Astec Semiconductor as3842 application notes PWM IC 8 PIN DIP 3844

AS3842 equivalent

Abstract: ASTEC RF modulator cost, high performance controllers which are pin compatible with the industry standard UC3842 series of , 1- Theory of Operation The functional block diagram of the AS3842 is shown in Figure 01. The IC is , AS3842 family of control ICs provide pin-for-pin replacement of the industry standard UC3842 series of , /4/5N AS3842/3/4/5D-8 AS3842/3/4/5 Current Mode Controller F ig u r« 1. Block Diagram of , output. The following paragraphs will describe the theory of operation of each of the functional blocks
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UC3842 p pwm AS3842 8 DIP 3842 ON Semiconductor tl 3842 p

8 pin ic 3844 for 5 volts

Abstract: PWM IC 8 PIN DIP 3844 843/3844/3845 APPLICATION INFORMATION Section 1 - Theory of Operation The AS3842/3/4/5 family of , standard UC3842 series of devices. Suitable for many switch mode power supply applications, these ICs have , block diagram of the AS3842 is shown in Figure 1. The IC is comprised of the six basic functions , describe the theory of operation of each of the functional blocks. 1.1 Under-voltage lockout (UVLO) The , , and the inverting (-) input is available at pin 2 (Vfb). The output of the error amplifier consists of
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as3843 application note buck 3845 PWM power supply application note 3842 buck converter ic 3842 8 pin ic 3842 PIN CONFIGURATION OF IC 3842 UC3842/43/44/45

as3843 application note buck

Abstract: pin diagram of ic 3843 performance controllers which are pin compatible with the industry standard UC3842 series of devices. Suitable , power supply manufacturing tolerances. The functional block diagram of the AS3842 is shown in Figure 1 , latch; and the output. The following paragraphs will describe the theory of operation of each of the , reference. Most obvious is the VREG pin (pin 8) which is the output of a series pass regulator. This 5.0 V , pin 2 (VF B ). The output o f the error amplifier consists of an active pull-down as shown in Figure
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ic 3843 JVC FLYBACK 3843 PWM power supply application note PIN CONFIGURATION OF IC 3845 3845 PWM controller 3843 Power Supply IC AS3842/3843/3844/3845

LD7530

Abstract: pin of the LD7530/LD7530A. Similar to UC3842, the LD7530/LD7530A would carry 2 diodes voltage , . This pin is to program the frequency of the low frequency timer. connecting a capacitor to ground to , threshold of the current sensing pin is set During the startup transient, the at 0.85V. From above , in the input of CS pin to prevent the false-trigger from the current spike. In the low power , COMP pin lower than 1.2V. The gate output pin of the LD7530/LD7530A will be disabled immediately
Leadtrend Technology
Original
LD7530 LD7530/7530A LD7530A LD7530A-DS-04

ld7535

Abstract: 08SP005 pin of the LD7535/LD7535A. Similar to UC3842, the LD7535/LD7535A would carry 2 diodes voltage , voltage threshold of the current sensing pin is set The typical startup circuit to generate the LD7535 , in the input of CS pin to prevent the false-trigger from the current spike. In the low power , UC384X, It takes slope compensation from injecting the ramp signal of the RT/CT pin through a coupling , gate output pin of the LD7535/LD7535A will be disabled immediately under such condition. The
Leadtrend Technology
Original
08SP005 2N60B LD7535AB UC3842 design with TL431 LD7535A LD7535A-DS-01
Abstract: off-time control â'â'¦etc. The basic operation Similar to UC3842, LD7532 would carry a theory of all , . Another function of this pin provides latch off control Current sense pin, connected to sense external , gate pulse produced current threshold of the current sensing pin is set at 0.85V. From , included in the Fig. 16 input of CS pin to prevent the false-trigger from the current spike. In the , signal of the RT/CT pin through a coupling capacitor, directly. and, therefore, requires no Leadtrend Technology
Original
LD7532-DS-00

4006 transformer

Abstract: PT2510 CASE 751 (S O -8) PIN CONNECTIONS Simplified Block Diagram Voltage Feedback n rInput L L , voltage. The peak inductor current is controlled by the threshold voltage of Pin 4 where: Pin 4 , . Also included are protective features consisting of input undervoltage lockout with hysteresis, c y c , State (Isink = 0.4 mA, V pg = 2.7 V) MULTIPLIER Dynamic Input Voltage Range Multiplier Input (Pin 3) Compensation (Pin 2) V V pin 3 Vpin 2 0 to 2.5 VpB to (VF B + 1 0 ) 0.4 0 to 3.5 V f b *° (V f b + 1.5) -0 .3
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4006 transformer PT2510 T-328 MC34261 MC33261 MC34261/MC33261 SG3561 TDA4817 PT4215

Coilcraft N2881-A

Abstract: motorola multiplier Equivalent to the TDA 4817 D SUFFIX PLASTIC PACKAGE CASE 751 (SO-8) Simplified Block Diagram PIN , devices such as the UC3842 series. Referring to the block diagram in Figure 15, note that a multiplier , Multiplier output voltage. The peak inductor current is controlled by the threshold voltage of Pin 4 where , MOSFET. Also included are protective features consisting of input undervoltage lockout with hysteresis , OH v OL 5.0 5.7 2.1 Dynamic Input Voltage Range Multiplier Input (Pin 3) Compensation
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Coilcraft N2881-A motorola multiplier N2880-A 5903B 03DPCG5 CMT3-28-2 9000C

ZD51

Abstract: lower than the UVLO threshold thus there is no gate pulse threshold of the current sensing pin is set , ) time is included in the input of CS pin to prevent the false-trigger caused by the current spike. In , is provided from the TL431 at the secondary side through the photo-coupler to the COMP pin of the , ramp signal of the RT/CT pin through a coupling capacitor. level will resume to normal level and the , below 1.2V. The gate output pin of the LD7551C will be disabled immediately under such condition. To
Leadtrend Technology
Original
ZD51 SB540 EI-22 EL817B LD7551C-DS-00

LD7552D

Abstract: LD7552D-DS-00 voltage pin This pin is to program the frequency of the low frequency timer. connecting a capacitor to , Corporation current threshold of the current sensing pin is set at 0.85V. From www.leadtrend.com.tw , of CS pin to prevent the false-trigger from the current spike. In the low power application, if the , provided from the TL431 at the secondary side through the photo-coupler to the COMP pin of the LD7552D , from injecting the ramp signal of the RT/CT pin through a coupling capacitor. It therefore requires
Leadtrend Technology
Original
LD7552D-DS-00 LD7552DPS UU9.8
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