ht82p604b Holtek Semiconductor Inc., ht82p604b Datasheet - Page 2

• Manufacturer Part Number: ht82p604b
• Description: Dc-dc Converter
• Manufacturer: Holtek Semiconductor Inc.

Pin Assignment
Pin Description
O C S E T
Pin No.
C O M P
V S E N
1
2
3
4~8
9, 10
11
V I D 0
V I D 1
V I D 2
V I D 3
V I D 4
S S
F B
H T 8 2 P 6 0 4 B
1
2
3
4
5
6
7
8
9
1 0
2 0 S O P
VSEN
OCSET
SS
VID0~4
COMP, FB
GND
Pin Name
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
R T
O V P
V C C
L G A T E
P G N D
B O O T
U G A T E
P H A S E
P G O O D
G N D
I/O
O
P
I
I
I
I
This pin is connected to the converters output voltage. The
PGOOD and OVP comparator circuits use this signal to report
output voltage status and for overvoltage protection.
Connect a resistor (R
per MOSFET. R
(I
converter over-current (OC) trip point.
I
An over-current trip cycles the soft-start function.
Connect a capacitor from this pin to ground. This capacitor,
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).
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
the COMP pin is the error amplifier output. These pins are used
to compensate the voltage-control feedback loop of the con-
verter.
Signal ground for the IC. All voltage levels are measured with
respect to this pin.
PEAK
OCS
Preliminary
), and the upper MOSFET on-resistance (r
=
I
OCS
r
DS(ON)
´
R
2
OCSET
OCSET
OCSET
, an internal 200mA current source
Description
) from this pin to the drain of the up-
HT82P604B
DS (ON)
March 23, 2000
) set the