HT82P604B 데이터 시트보기 (PDF) - Holtek Semiconductor
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HT82P604B Datasheet PDF : 7 Pages
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Pin Assignment
VSEN
O CSET
SS
V ID 0
V ID 1
V ID 2
V ID 3
V ID 4
COM P
FB
1
20
2
19
3
18
4
17
5
16
6
15
7
14
8
13
9
12
10
11
H T82P 604B
20 S O P
RT
O VP
VCC
LG A TE
PG ND
BO O T
U G ATE
PHASE
PG O O D
GND
Preliminary
HT82P604B
Pin Description
Pin No. Pin Name
1
VSEN
2
OCSET
3
SS
4~8
VID0~4
9, 10 COMP, FB
11
GND
I/O
Description
This pin is connected to the converters output voltage. The
I PGOOD and OVP comparator circuits use this signal to report
output voltage status and for overvoltage protection.
Connect a resistor (ROCSET) from this pin to the drain of the up-
per MOSFET. ROCSET, an internal 200mA current source
(IOCS), and the upper MOSFET on-resistance (rDS (ON)) set the
I converter over-current (OC) trip point.
IPEAK
= IOCS ´ ROCSET
rDS(ON)
An over-current trip cycles the soft-start function.
Connect a capacitor from this pin to ground. This capacitor,
O along with an internal 10mA current source, sets the soft-start
interval of the converter.
VID0-4 are the input pins to the 5-bit DAC. The states of these
five pins program the internal voltage reference (DACOUT).
I The level of DACOUT sets the converter output voltage. It also
sets the PGOOD and OVP thresholds. Table 1 specifies
DACOUT for the 32 combinations of DAC inputs.
COMP and FB are the available external pins of the error ampli-
fier. The FB pin is the inverting input of the error amplifier and
I the COMP pin is the error amplifier output. These pins are used
to compensate the voltage-control feedback loop of the con-
verter.
P
Signal ground for the IC. All voltage levels are measured with
respect to this pin.
2
March 23, 2000
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