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TEXAS INSTRUMENTS  UC3844N  PWM Controller, 12V-25V supply, 450kHz, 13.5V/1A out, DIP-8

TEXAS INSTRUMENTS UC3844N

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Product Overview

The UC3844N is a Current Mode PWM Controller optimized for off-line and DC to DC converters. This device provides the necessary features to implement off-line or DC-to-DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include under-voltage lockout featuring start up current less than 1mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which 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 off state.
  • Optimized for off-line and DC to DC converters
  • Low start up current (<1mA)
  • Automatic feed forward compensation
  • Pulse-by-pulse current limiting
  • Enhanced load response characteristics
  • Under-voltage lockout with hysteresis
  • Double pulse suppression
  • High current totem pole output
  • Internally trimmed bandgap reference
  • Green product and no Sb/Br

Applications

Power Management

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Product Information

Input Voltage:
25V
Output Voltage:
13.5V
Output Current:
1A
Supply Voltage Min:
12V
Supply Voltage Max:
25V
Controller IC Case Style:
DIP
No. of Pins:
8Pins
Frequency:
450kHz
Operating Temperature Min:
0°C
Operating Temperature Max:
70°C
Packaging:
Each
Power Dissipation Pd:
1 W
MSL:
-
Supply Voltage Range:
12V to 25V
SVHC:
No SVHC (15-Jun-2015)
Digital IC Case Style:
DIP

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Legislation and Environmental

Moisture Sensitivity Level:
-
Product Traceability
RoHS Compliant:
Yes

Applications

  • Power Management

Substitutes

Current Mode PWM Controller, 12V-25V supply, 250kHz, 13.5V/200mA out, DIP-8

STMICROELECTRONICS

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Pricing is unavailable. Please contact customer services.

IC, PWM CONTROLLER, 3845, DIP8

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Price for: Each

1+ $0.861 10+ $0.704 25+ $0.455 50+ $0.337 More pricing

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Current Mode PWM Controller, 12V-25V supply, 30V/200mA out, 100 kHz, DIP-8

TEXAS INSTRUMENTS

123: 

Price for: Each

1+ $1.02 10+ $0.871 100+ $0.671 500+ $0.593 More pricing

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