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PDF L4003 Data sheet ( Hoja de datos )
| Número de pieza | L4003 | |
| Descripción | Current Mode PWM Controller | |
| Fabricantes | LIZE | |
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Hay una vista previa y un enlace de descarga de L4003 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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Shenzhen LIZE Electronic Technology Co., Ltd
SPECIFICATION
L4003
Current Mode PWM Controller
VERSION 1.0
reserves the right to change this documentation without prior notice
1 page  
L4003
Shenzhen LIZE Electronic Technology Co., Ltd
Frequency
50K—120K
120K—180K
180K—250K
250K—330K
330K—410K
410K—500K
Compensation Table
L1 R2
68--160uH
330
47—68uH
330
33—47uH
330
22—33uH
330
15—22uH
100
10—15uH
100
C4
8.2n
4.7n
1.8n
1n
510p
330p
C5
6.8n
1.8n
1n
510p
510p
330p
Function Descriptions
EN
This pin can be supplied shutdown function. It is inside pull high function. For normal application,
the pin must be connected a capacitor to ground. Allow the switching regulator circuit to be shutdown
pulling this pin below a 0.8V threshold voltage; the shutdown supply current is approximately 150uA.
OSC
External frequency set pin. The pin connects a resistance (R3) to reduce system frequency. This
converter’s frequency can be set from 50K to 500KHz, Please refer the below table to set frequency.
R3
Frequenc
510K
50KHz
220K
100KHz
91K
200KHz
47K
300KHz
27K
400KHz
20K
500KHz
COMP
Compensation pin. For EL output capacitor application, the COMP pin connects R2 and C4 to
ground for all condition;
OCSET
The current limit threshold is setting by the external resistor connecting from VCC supply to
深圳市励致电子技术有限公司 REV:1
2013-4
4/7
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet L4003.PDF ] | |
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