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UCC39421 - Multimode High Frequency PWM Controller

General Description

SYNC/SD 13 RT 14 1.8 V(MIN) 1.24 V VREF PWM OSC VPUMP 7 VIN 9 CHARGE PUMP VPUMP 8 CP 3 VOUT 2 RSEN RECT 4 ANTI

CROSS COND.

Key Features

  • include pulse-by-pulse current limiting, and a low 5-µA quiescent current during shutdown. The UCC39422 incorporates programmable power-on reset circuitry and an uncommitted comparator for low voltage detection. The available packages are 20-pin TSSOP or 20-pin N for the UCC39422, and 16-pin TSSOP or 16-pin N for the UCC39421. absolute maximum ratings over operating free-air temperature range (unless otherwise noted)Ĕ} Supply Voltage (VIN, VOUT,VPUMP).

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Datasheet Details

Part number UCC39421
Manufacturer Unitrode
File Size 1.18 MB
Description Multimode High Frequency PWM Controller
Datasheet download datasheet UCC39421 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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ą UCC29421, UCC29422, UCC39421, UCC39422 MULTIMODE HIGHĆFREQUENCY PWM CONTROLLER SLUS246C − OCTOBER 1999 − REVISED FEBRUARY 2005 D Operation Down to an Input Voltage of 1.8 V simplified schematic block diagram and application circuit D High Efficiency Boost, SEPIC or Flyback (Buck-Boost) Topologies D Drives External FETs for High-Current Applications D Up to 2-MHz Oscillator D Synchronizable Fixed Frequency Operation D High-Efficiency Low-Power Mode D High-Efficiency at Very Low-Power with Programmable Variable Frequency Mode D Pulse-by-Pulse Current Limit D 5-µA Supply Current in Shutdown D 150-µA Supply Current in Sleep Mode D Selectable NMOS or PMOS Rectification D Built-In Power-On Reset (UCC39422 Only) D Built-In Low-Voltage Detect (UCC39422 Only) description SYNC/SD 13 RT 14 1.