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STMICROELECTRONICS UC2844BD1

PWM CONTROLLER, -25 TO 85DEG C

STMICROELECTRONICS UC2844BD1
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Manufacturer Part No:
UC2844BD1
Order Code:
3367209
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Technical Datasheet:
UC2844BD1   Datasheet
ECAD / MCAD
Supply Frame Models Link
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Product Overview

UC2844BD1 is a high-performance current mode PWM controller. This control IC provides the necessary features to implement offline or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under-voltage lockout featuring a start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to ensure latched operation, a PWM comparator that also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-channel MOSFETs, is low in the offstate. Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges.
  • Trimmed oscillator for precise frequency control
  • Oscillator frequency guaranteed at 250KHz
  • Current mode operation to 500KHz
  • Automatic feed-forward compensation, low start-up and operating current
  • Latching PWM for cycle-by-cycle current limiting
  • Internally trimmed reference with undervoltage lockout
  • High current totem pole output
  • Undervoltage lockout with hysteresis
  • SO8 package, -40 to 150°C junction operating temperature
  • Supply voltage (low impedance source) is 30V, ±1A output current

Warnings

Market demand for this product has caused an extension in leadtimes. Delivery dates may fluctuate. Product exempt from discounts.

Product Information

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:
30V

:
5V

:
1A

:
-V

:
-V

:
SOIC

:
8Pins

:
500kHz

:
-25°C

:
85°C

:
-

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Technical Documents (2)

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Due to market conditions delivery times are for general guidance only and may be subject to change at short notice

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