mb3883pv Fujitsu Microelectronics, Inc., mb3883pv Datasheet - Page 20

• Manufacturer Part Number: mb3883pv
• Description: 6-ch Dc/dc Converter Ic With Synchronous Rectification For Voltage Step-up And Step-down
• Manufacturer: Fujitsu Microelectronics, Inc.

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MB3883
4. Soft Start Operation
1. Description
• When the CTL, CTL1,2, CTL3, CTL4, and CTL5 terminals are driven high (“H” level) at the same time
The capacitor (C+IN6) connected to the C+IN6 terminal (pin 5) starts charging. When the C+IN6 terminal voltage
falls below 0.9 V (Typ.), the capacitor (Cs) connected to the CS terminal (pin 15) starts charging and the error
amp. provides a soft start by comparing the CH1 to CH5 output voltage to the voltage at the CS terminal.
Input
Output
CTL (pin 20)
CTL1, 2 (pin 21)
CTL3 (pin 22)
CTL4 (pin 23)
CTL5 (pin 24)
VB (pin 27)
C IN6 (pin 5)
CH6 output voltage
Vo6
VREF (pin 16)
CS (pin15)
CH1 to CH5 output
voltage Vo1 to Vo5
(1) to (2)
(3) to (4)
:
:
CH6
CH1 to CH5
soft start interval
2 V
(1)
soft start interval
2.49 V
0.9 V
(3) (2)
1.25 V
(4)
t