ht82p604b Holtek Semiconductor Inc., ht82p604b Datasheet - Page 5

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

Functional Description
Output voltage program
The output voltage of a HT82P604B converter
is programmed to discrete levels between 1.3V
and 3.5V. The voltage identification (VID) pins
program an internal voltage reference
(DACOUT) with a 5-bit digital-to-analog con-
verter (DAC). The level of DACOUT also sets
the PGOOD and OVP thresholds. Table 1 speci-
fies the DACOUT voltage for the 32 combina-
tions of open or short connections on the VID
pins. The output voltage should not be adjusted
while the converter is delivering power. Re-
move input power before changing the output
voltage. Adjusting the output voltage during
operation could toggle the PGOOD signal and
exercise the overvoltage protection.
VID4 VID3 VID2 VID1 VID0
Symbol
V
PGOOD
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
Lower Threshold
(V
Hysteresis
(V
PGOOD Voltage Low
Pin Name
SEN
SEN
/DACOUT)
/DACOUT)
1
1
1
1
0
0
0
0
1
1
1
Parameter
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
Nominal
Voltage
Output
Dacout
1.30
1.35
1.40
1.45
1.50
1.55
1.60
1.65
1.70
1.75
1.80
Preliminary
V
12V V
12V
12V I
CC
Upper and Lower
Threshold
Test Conditions
PGOOD
SEN
5
Conditions
Falling
Note: 0=connected to GND or VSS, 1=OPEN
=-5mA
VID4 VID3 VID2 VID1 VID0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Table 1 Output voltage program
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
Pin Name
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
Min. Typ. Max. Unit
89
¾
¾
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0.5
¾
2
HT82P604B
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
March 23, 2000
94
¾
¾
Nominal
Voltage
Output
Dacout
1.85
1.90
1.95
2.00
2.05
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
3.0
3.1
3.2
3.3
3.4
3.5
0
%
%
V