參數(shù)資料
型號(hào): L6610
廠商: 意法半導(dǎo)體
英文描述: DIGITALLY PROGRAMMABLE SECONDARY HOUSEKEEPING CONTROLLER
中文描述: 數(shù)字可編程控制器二次內(nèi)務(wù)管理
文件頁數(shù): 26/29頁
文件大?。?/td> 544K
代理商: L6610
L6610
26/29
7
In fig. 26 a circuit is suggested to obtain the regulated +3.3V output with a linear configuration instead of the
Magamp circuitry.
In this case the output of the E/A modulates the gate-source voltage of a power MOS in series with the power
stage.
In fig. 27 a simple and cheap latch circuit is showed to manage an OV fault on the Auxiliary output in the same
way of an OC (UV) fault, without having recourse to a (expensive) power crowbar. By tuning the value of R
SET
it is possible to set the voltage value that triggers the latch circuit; C
DEL
defines the turn-on delay. A diode con-
nected between the collector of Q1 and Cout pulls down the output of the auxiliary E/A: this has the same effect
of the OCP_bounce internal signal that guarantees the reduction of duty cycle.
APPLICATION IDEAS
Figure 26. Controlling a Linear Regulator with the Error Amplifier B
Figure 27. Auxiliary OVP without Crowbar
+3.3V
Bout
Binv
+1.25V
R
L
R
H
_
+
L6610
+5V
R
B
L
C
1
C
2
+12V
Z
C
L6610
V
AUX
DMON
100
5K6
5K6
Q2
BC558
Q1
BC548
R
SET
C
DEL
Cout
D1
BAT42
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