MITSUBISHI SEMICONDUCTORS <Standard Linear ICs>
M62212P/FP/GP
GENERAL PURPOSE DC-DC CONVERTER
Comp1
FB
1.86V
(Initial RESET)
R
Q
1.25V
I1
10µ
SW1
DTC
I3
60µ
Vcc
I2
35µ
S
C
DTC
R
DTC
90KΩ
(900mV)
SW2
Comp2
1.15V
0.3V
* SW1 and SW2 are turned ON by "H" signal.
FB
2.0
1.15
1.0
DTC
DTC set up value (Tentative)
OSC
0.45
0
I1
I2
I3
ON
ON
OFF
45µ
ON
OFF
ON
50µ
ON
OFF
OFF
Charge
10µ
ON
OFF
ON
Discharge
ON
OFF
OFF
Charge
10µ
ON
ON
OFF
45µ
ON
ON
OFF
45µ
ON
OFF
ON
50µ
ON
OFF
OFF
Charge
10µ
ON
OFF
ON
ON
ON
ON
Charge
Discharge
Charge Charge
Discharge
50µ
Discharge Discharge
50µ
15µ
Activate
[I]
Output short
ON/OFF control --> Activate
Output short (Latch)
[ IV ]
[ II ]
[ III ]
Fig.3 Short Protection Circuit and the Timing Chart of the Modes
(7/8)
MITSUBISHI [ MITSUBISHI ELECTRIC SEMICONDUCTOR ]
