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參數(shù)資料
| 型號： | L5991D |
| 廠商： | 意法半導體 |
| 英文描述： | PRIMARY CONTROLLER WITH STANDBY |
| 中文描述： | 主控制器具有待機 |
| 文件頁數(shù)： | 1/19頁 |
| 文件大?。?/td> | 192K |
| 代理商： | L5991D |
L5991
L5991A
PRIMARY CONTROLLER WITH STANDBY
CURRENT-MODE CONTROL PWM
SWITCHINGFREQUENCY UP TO 1MHz
LOW START-UP CURRENT (< 120
μ
A)
HIGH-CURRENT OUTPUT DRIVE SUITABLE
FOR POWERMOSFET (1A)
FULLY LATCHED PWM LOGIC WITH DOU-
BLE PULSE SUPPRESSION
PROGRAMMABLE DUTY CYCLE
100%AND50%MAXIMUMDUTY CYCLELIMIT
STANDBYFUNCTION
PROGRAMMABLE SOFT START
PRIMARY OVERCURRENT FAULT DETEC-
TIONWITH RE-START DELAY
PWMUVLO WITH HYSTERESIS
IN/OUT SYNCHRONIZATION
LATCHED DISABLE
INTERNAL 100ns LEADING EDGE BLANK-
ING OF CURRENT SENSE
PACKAGE:DIP16 ANDSO16
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 frequencycurrentmode 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 usedfor over voltageprotectionand
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
Standbyfunction for oscillator frequencyreduction
when the converteris lightlyloaded.
August 1999
+
-
+
-
TIMING
2
3
+
-
14
T
Vref
DIS
2.5V
+
-
1.2V
13
BLANKING
PWM
FAULT
SOFT-START
R
S
Q
25V
15V/10V
VREF OK
+
-
E/A
1V
R
2R
DIS
2.5V
7
6
5
11
10
9
4
8
15
1
13V
PWM UVLO
12
SGND
COMP
SS
ISEN
DIS
DC
RCT
SYNC
DC-LIM
V
CC
VREF
D97IN725A
VFB
PGND
OUT
V
C
OVER CURRENT
STAND-BY
ST-BY
VREF
16
BLOCK DIAGRAM
ORDERING NUMBERS:
L5991/L5991A (DIP16)
L5991D/L5991AD (SO16)
MULTIPOWER BCD TECHNOLOGY
DIP16
SO16
1/23
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| L5991D013TR | 功能描述:電流型 PWM 控制器 Prog Current Mode RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| L5993 | 功能描述:開關變換器、穩(wěn)壓器與控制器 Prog Current Mode RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L5993D | 功能描述:開關變換器、穩(wěn)壓器與控制器 Prog Current Mode RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L5993D013TR | 功能描述:開關變換器、穩(wěn)壓器與控制器 Prog Current Mode RoHS:否 制造商:Texas Instruments 輸出電壓:1.2 V to 10 V 輸出電流:300 mA 輸出功率: 輸入電壓:3 V to 17 V 開關頻率:1 MHz 工作溫度范圍: 安裝風格:SMD/SMT 封裝 / 箱體:WSON-8 封裝:Reel |
| L5994 | 功能描述:電流型 PWM 控制器 Adj Triple Out Pwr RoHS:否 制造商:Texas Instruments 開關頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
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