PS10 SUTEX [Supertex, Inc], PS10 Datasheet - Page 10

• Manufacturer Part Number: PS10
• Description: Quad Power Sequencing Controller
• Manufacturer: SUTEX [Supertex, Inc]

Opto-isolated Enable,
Increasing the Under and Over Voltage Hysteresis
If the internal UV hysteresis is insufficient for a particular system application, then it may be increased by using separate resis-
tor dividers for UV and OV and providing a resistor feedback from UV pin to the PWRGD pin.
GND
-48V
GND
-48V
Ruvhys can be calculated based on higher UV On voltage (say
42V):
Ruvhys = (Vuvon - Vdiode - Vpwrgdlow)/((Vin-Vuvon)/487k -
Vuvon/16.5k)
= (1.22-0.65-0.4)/((42-1.22)/487k - 1.22/16.5k)
= 17.35k
16.5k
487k
9.76K
487K
6.81K
Notes:
1. Under Voltage Shutdown (UV) set to 37V.
2. Over Voltage Shutdown (OV) to 57.8V.
3. Other power good outputs will have the same
configuration as PWGRGD-A for Active Low Enabled
Converters.
499k
9.76k
OV
UV
Ruvhys
V
EE
RTB
V
TB
IN
RTC
PS11
OV
V
TC
UV
EE
continued
RTB
RTD
V
TB
IN
TD
RTC
PS10
TC
Ramp
PWRGD-D
PWRGD-C
PWRGD-B
PWRGD-A
RTD
10nF
TD
Ramp
PWRGD-D
PWRGD-C
PWRGD-B
PWRGD-A
10
10nF
Note:
1. Other power good outputs will have the same configuration as
PWGRGD-A for Active High Enabled Converters.
2. Over voltage shut down set to 63.6V
49.9k
Opto-coupler
V+
/EN
V-
V+
EN
V-
DC/DC
Converter
DC/DC
Converter
+3.3V
COM
+3.3V
COM
A051204