參數(shù)資料
型號(hào): L6731BTR
廠商: STMICROELECTRONICS
元件分類: 穩(wěn)壓器
英文描述: 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
封裝: HTSSOP-16
文件頁(yè)數(shù): 4/24頁(yè)
文件大?。?/td> 439K
代理商: L6731BTR
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Device description
L6731B
12/24
5.5
Error amplifier
5.6
Soft start
When both VCC and VIN are above their turn-ON thresholds (VIN is monitored by the OCH pin)
the start-up phase takes place. Otherwise the SS pin is internally shorted to GND. At start-up, a
ramp is generated charging the external capacitor CSS with an internal current generator. The
initial value for this current is 35A and charges the capacitor up to 0.5V. After that it becomes
10A until the final charge value of approximately 4V (see Figure 6.).
Figure 5.
Error Amplifier Reference
Figure 6.
Device start-up: Voltage at the SS pin.
2.5V
100K
DDR-IN
VCCDR
0.6V/500KHz
0.6V/250KHz
DDR-IN/2
250KHz
Error Amplifier Ref.
VCC
VIN
t
0.5V
4V
Vcc
Vin
Vss
4.2V
1.25V
相關(guān)PDF資料
PDF描述
L6731B 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
L6731D 20 A SWITCHING CONTROLLER, 500 kHz SWITCHING FREQ-MAX, PDSO16
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