Part Number: DAP002 ( = L5991 )
Function: PWM ( Pulse-Width Modulation ) Controller
Package: SOP 16 Pin
Manufacturer: DEI, ST
Image
Description
This primary controller I.C., developed in BCD60II technology, has been designed to implement off line or DC-DC power supply applications using a fixed frequency current mode control. Based on a standard current mode PWM controller this device includes some features such as programmable soft start, IN/OUT synchronization, disable (to be used for over voltage protection and for power management), precise maximum Duty Cycle Control, 100ns leading edge blanking on current sense, pulse by pulse current limit, overcurrent protection with soft start intervention, and Standby function for oscillator frequency reduction when the converter is lightly loaded.
Pinout
Features
1. CURRENT-MODE CONTROL PWM
2. SWITCHINGFREQUENCY UP TO 1MHz
3. LOW START-UP CURRENT (< 120mA)
4. HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWERMOSFET (1A)
5. FULLY LATCHED PWM LOGIC WITH DOUBLE PULSE SUPPRESSION
6. PROGRAMMABLE DUTY CYCLE
7. 100%AND50%MAXIMUMDUTY CYCLELIMIT
8. STANDBY FUNCTION
9. PROGRAMMABLE SOFT START
10. PRIMARY OVERCURRENT FAULT DETECTION WITH RE-START DELAY
11. PWMUVLO WITH HYSTERESIS
12. IN/OUT SYNCHRONIZATION
13. LATCHED DISABLE
14. INTERNAL 100ns LEADING EDGE BLANKING OF CURRENT SENSE
Refernece Site
1. http://monitor.espec.ws/section27/topic179114.html
DAP002 Datasheet
Similar features and reference parts
DAP008
Other data sheets are available within the file: DAP002TR
