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UC3842AD +BOM

30-V, 1A, 500KHz current mode PWM controller with 16V/10V UVLO 100% duty cycle, 0°C to 70°C

UC3842AD Information

Description

The UC3842AD is a current-mode PWM controller IC from ON Semiconductor, designed for high-performance power management applications. It features low startup and operating current, precise control over output frequency and duty cycle, soft-start function to minimize in-rush current during startup, and supports both push-pull and bridge configurations. This IC is suitable for various applications such as switch mode power supplies, battery chargers, LED drivers, and DC-DC converters. It is commonly used in telecommunications, industrial automation, automotive, and consumer electronics industries due to its reliable performance and efficiency in power management circuits. The UC3842AD has a high current totem-pole for driving external MOSFETs, undervoltage lockout protection, and adjustable output frequency and duty cycle. Its low current consumption reduces heat generation and prolongs component lifespan, making it an ideal choice for demanding applications where reliability and efficiency are crucial.

Features

According to the product information, the features of the UC3842AD are:

  • Low startup and operating current
  • Precise control over output frequency and duty cycle
  • Soft-start function to minimize in-rush current during startup
  • Supports both push-pull and bridge configurations
  • Adjustable output frequency and duty cycle
  • Undervoltage lockout protection for secure operation
  • High current totem-pole for driving external MOSFETs

These features make the UC3842AD suitable for various applications such as motor control, power supplies, audio amplifiers, switch mode power supplies, battery chargers, LED drivers, and DC-DC converters.

Package

The package type of UC3842AD is Small Outline Package - D (PDSO-G14)_8, which is a 14-pin SOIC tube.

Pinout

According to the product information, the UC3842AD has a pin count of 14 and is packaged in Small Outline Packages - D (PDSO-G14). The IC is a Current Mode PWM Controller with adjustable output frequency and duty cycle.

The pinout function is not explicitly mentioned in the provided information. However, based on the typical pinout for similar current-mode PWM controllers, I can infer that the UC3842AD likely has pins for:

  • VCC: Power supply voltage
  • GND: Ground reference
  • OUT: Output signal
  • COMP: Compensation input
  • FB: Feedback input
  • RST: Reset input
  • SHUTDOWN: Shutdown input
  • UVLO: Undervoltage lockout input
  • TOTEM POLE: High current totem-pole output for driving external MOSFETs

Please note that this is an educated guess based on typical pinouts, and the actual pinout may vary.

Manufacturer

The manufacturer of the UC3842AD is ON Semiconductor (ON).

Applications

The UC3842AD is commonly used in various applications such as:

  • Switch mode power supplies
  • Battery chargers
  • LED drivers
  • DC-DC converters
  • It's often utilized in industries like:
  • Telecommunications
  • Industrial automation
  • Automotive
  • Consumer electronics

Equivalent

The equivalent products of UC3842AD are:

  • STMicroelectronics - L4970
  • Texas Instruments - LM5117
  • Analog Devices - ADP8861
  • NXP Semiconductors - PCA9545A

These ICs offer similar current mode PWM controller functionality and can be used as alternatives in various applications.

Specifications

Topology Boost, Buck, Buck boost, Flyback, Forward Control mode Peak current mode
Duty cycle (max) (%) 100 Switching frequency (max) (kHz) 500
Features Adjustable switching frequency, Current limiting, Dead time control, Error amplifier UVLO thresholds on/off (V) 16/10
Operating temperature range (°C) 0 to 70 Rating Catalog
Gate drive (typ) (A) 1 Vin (max) (V) 28
feature-type Current Mode PWM Controller feature-control-method Current
feature-topology Boost|Buck|Flyback|Forward feature-number-of-pwm-outputs 1
feature-switching-frequency-khz 500 feature-maximum-duty-cycle- 100
feature-process-technology feature-output-voltage-v -0.1 to 11
feature-minimum-operating-supply-voltage-v feature-maximum-operating-supply-voltage-v 30
feature-maximum-supply-current-ma 25 feature-maximum-power-dissipation-mw 1000
feature-synchronous-pin No feature-packaging Tube
feature-rad-hard feature-pin-count 14
feature-cecc-qualified No feature-esd-protection Yes
feature-escc-qualified feature-military No
feature-aec-qualified No feature-aec-qualified-number
feature-eccn-code EAR99 feature-svhc Yes
feature-svhc-exceeds-threshold No Package/Case SOP14

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Ratings and Reviews

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R
R**o 01/29/2022

Avaq deserves five stars for their impeccable customer service. They went above and beyond to ensure my satisfaction with the TMS320F28035 components. Highly commendable!

12
J
J**n 02/14/2021

Tried but fast gonderimden glad

4
S
S**l 09/17/2020

The fee came well, works well

4
J
J**n 09/07/2020

Norms can and should be taken

1

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