MB39A102_05 Datasheet, PDF (5/32 Pages) Tyco Electronics – 4-ch DC/DC Converter IC

MB39A102
■ BLOCK DIAGRAM
Threshold voltage
−INE1
29
12
accuracy ±1.5%
µAVREF
Error
− ^Amp1
CS1 30
++
FB1 28
1.24 V
L priority
DTC1 27
L priority
PWM
++^Comp.1
−
CH1
Drive1
Pch
IO = 130 mA
at VCCO = 4 V
26 VCCO
25 OUT1
Threshold voltage
−INE2
2
12
accuracy
µAVREF
−
±1.5%
Error
Amp2
CS2 1
++
FB2 3
1.24 V
L priority
DTC2 4
L priority
PWM
++^Comp.2
−
CH2
Drive2
Pch
IO = 130 mA
at VCCO = 4 V
24 OUT2
Threshold voltage
−INE3
14
12
accuracy ±1.5%
µAVREF
Error
− ^Amp3
CS3 15
++
1.24 V
FB3 13
L priority
DTC3 12
Threshold voltage
−INE4
17
12
accuracy ±1.5%
µAVREF
Error
− ^Amp4
CS4 16
++
FB4 ¹⁸
1.24 V
L priority
DTC4 ¹⁹
L priority
PWM
++^Comp.3
−
CH3
Drive3
Pch
IO = 130 mA
at VCCO = 4 V
L priority
PWM
++^Comp.4
−
CH4
Drive4
Nch
IO = 130 mA
at VCCO = 4 V
23 OUT3
22 OUT4
21 GNDO
VREF
83 kΩ
SCP
Comp.
−INS 20
−
+
1V
CSCP 11
SCP
UVLO
H:
at SCP
Error Amp Power Supply
SCP Comp. Power Supply
H:UVLO
release
5
Error Amp Reference
bias 1.24 V
VCC
OSC
89
0.9 V Accuracy
0.4 V ^±1%
2.0 V
7
VREF
Power
VR1 ^ON/OFF
CTL
10
6 CTL
H : ON (Power/ ON)
L : OFF (Standby mode)
RT CT
VREF
GND
VTH = 1.4 V
5