PDF預(yù)覽

• 1
• 2
• 3
• 4
• 5
• 6
• 7
• 8
• 9
• 10
• 11
• 12
• 13
• 14
• 15
• 16
• 17
• 18
• 19

廬

L5991

L5991A

PRIMARY CONTROLLER WITH STANDBY

CURRENT-MODE CONTROL PWM

SWITCHING FREQUENCY UP TO 1MHz

LOW START-UP CURRENT (< 120

碌

A)

HIGH-CURRENT OUTPUT DRIVE SUITABLE

FOR POWER MOSFET (1A)

FULLY LATCHED PWM LOGIC WITH DOU-

BLE PULSE SUPPRESSION

PROGRAMMABLE DUTY CYCLE

100%AND 50% MAXIMUM DUTY CYCLE LIMIT

STANDBY FUNCTION

PROGRAMMABLE SOFT START

PRIMARY OVERCURRENT FAULT DETEC-

TION WITH RE-START DELAY

PWM UVLO WITH HYSTERESIS

IN/OUT SYNCHRONIZATION

LATCHED DISABLE

INTERNAL 100ns LEADING EDGE BLANK-

ING OF CURRENT SENSE

PACKAGE: DIP16 AND SO16

DESCRIPTION

This primary controller I.C., developed in BCD60II

technology, has been designed to implement off

BLOCK DIAGRAM

SYNC

1

RCT

2

TIMING

25V

DC-LIM

15

MULTIPOWER BCD TECHNOLOGY

DIP16

SO16

ORDERING NUMBERS:

L5991/L5991A (DIP16)

L5991D/L5991AD (SO16)

line or DC-DC power supply applications using a

fixed frequency current mode control.

Based on a standard current mode PWM control-

ler 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, over-

current protection with soft start intervention, and

Standby function for oscillator frequency reduction

when the converter is lightly loaded.

V

CC

8

VREF

4

3

DC

14

DIS

2.5V

+

-

-

+

T

DIS

Vref

+

15V/10V

-

PWM UVLO

9

V

C

13V

BLANKING

S

R

PWM

10

OUT

Q

OVER CURRENT

ISEN

13

+

-

FAULT

SOFT-START

VREF OK

CLK

DIS

VREF

11

16

PGND

ST-BY

SS

7

1.2V

STAND-BY

+

E/A

2.5V

2R

1V

R

12

SGND

6

COMP

-

5

VFB

D97IN725A

August 1999

1/23

next

L5991相關(guān)型號(hào)PDF文件下載

• 型號(hào)
  版本
  描述
  廠商
  下載
• L5991
  英文版
  PRIMARY CONTROLLER WITH STANDBY
  
  L5991
• L5991
  英文版
  PRIMARY CONTROLLER WITH STANDBY
  STMICROELECTRON...
  L5991
• L5993
  英文版
  CONSTANT POWER CONTROLLER
  
  L5993
• L5993
  英文版
  CONSTANT POWER CONTROLLER
  STMICROELECTRON...
  L5993
• L5994
  英文版
  ADJUSTABLE TRIPLE OUTPUT POWER SUPPLY CONTROLLER
  
  L5994
• L5994
  英文版
  ADJUSTABLE TRIPLE OUTPUT POWER SUPPLY CONTROLLER
  STMICROELECTRON...
  L5994
• L5995
  英文版
  Current-Mode SMPS Controller
  ETC
  L5995
• L5995
  英文版
  ACCURATE 4 BIT PROGRAMMABLE POWER SUPPLY CONTROLLER FOR MOBI...
  STMicro
  L5995
• L5996
  英文版
  5 BIT DYNAMIC DAC CONTROLLER FOR MOBILE CPU
  
  L5996
• L5996
  英文版
  5 BIT DYNAMIC DAC CONTROLLER FOR MOBILE CPU
  STMICROELECTRON...
  L5996
• L5991A
  英文版
  PRIMARY CONTROLLER WITH STANDBY
  
  L5991A
• L5991A
  英文版
  PRIMARY CONTROLLER WITH STANDBY
  STMICROELECTRON...
  L5991A
• L5991D
  英文版
  PRIMARY CONTROLLER WITH STANDBY
  
  L5991D
• L5991D
  英文版
  Converter Offline Boost, Flyback Topology Up to 1MHz 16-SO
  L5991D
• L5991D
  英文版
  PRIMARY CONTROLLER WITH STANDBY
  STMICROELECTRON...
  L5991D
• L5993D
  英文版
  CONSTANT POWER CONTROLLER
  
  L5993D
• L5993D
  英文版
  Flyback Regulator Positive, Isolation Capable Output Step-Up...
  L5993D
• L5993D
  英文版
  CONSTANT POWER CONTROLLER
  STMICROELECTRON...
  L5993D
• L5994A
  英文版
  ADJUSTABLE TRIPLE OUTPUT POWER SUPPLY CONTROLLER
  ETC
  L5994A
• L5994A
  英文版
  ADJUSTABLE TRIPLE OUTPUT POWER SUPPLY CONTROLLER
  
  L5994A

您可能感興趣的PDF文件資料

• L5991
• L5991D
• L5991AD
• L5994
• L5993
• L5991D
• L5991D
• L5991AD13TR
• L5991AD
• L5991AD
• L5991A
• L5991A

熱門IC型號(hào)推薦

• LTC1659CS8
• L6571AD013TR
• LSM303DTR
• LMSP54AA-079
• LMV932MMX
• LM5642MTC
• LTC4054ES5-4.2
• LP2980IM5X-5.0
• LM5Z3V6T1G
• LT1085CT-3.3
• LT1004IS8-2.5
• LM3914N-1