upc1909 Renesas Electronics Corporation., upc1909 Datasheet - Page 5

• Manufacturer Part Number: upc1909
• Description: Switching Regulator Control Ic
• Manufacturer: Renesas Electronics Corporation.

1. PIN FUNCTION LIST
Pin No.
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
OV
C
GND
OC
DTC
OUT
ON/OFF
EMI
V
EMI
OUT
FB
DTC
V
R
C
Symbol
T2
CC
REF
T
T
2
1
2
1
2
1
Overvoltage protection
This is the input pin of the overvoltage detection comparator. Directly connect this pin to GND when not used.
OLS shift setting
The resistor that determines the amount of level shift for dC
is connected between this pin and the V
Ground
This is the signal ground pin.
Overcurrent protection
This is the input pin of the overcurrent detection comparator. Directly connect this pin to GND when not used.
OUT
This pins sets the dead time of the OUT
OUT
This is the subswitch drive output pin.
ON/OFF control
The output circuit can be switched on or off by inputting an external signal.
Directly connect this pin to V
OUT
This is a power supply ground pin. This pin must be isolated from the signal ground pin (GND).
Power supply
OUT
This is a power supply ground pin. This pin must be isolated from the signal ground pin (GND).
OUT
This is the main switch drive output pin.
Feedback input
This is the feedback input pin of PWM comparators 1 and 2.
OUT
This pin sets the maximum duty of the OUT
Reference voltage
This pin outputs a 4.9-V TYP. reference voltage.
Timing resistance
The resistor that determines the oscillation frequency is connected between this pin and GND.
Timing capacitance
The capacitor that determines the oscillation frequency is connected between this pin and GND.
This pin outputs a triangle wave.
2
2
2
1
1
1
dead time setting
output
emitter
emitter
output
dead time setting
REF
Data Sheet G14309EJ2V0DS00
when not used.
REF
2
output.
pin.
1
output and determines the minimum duty of the OUT
Function
T
(an internal triangle wave that is a level-shifted C
PC1909
2
output.
T
)
5