THV3543_Rev.1.00_E
Pin Descriptions
Pin #
1
2
3
4
Symbol
PC2
FB1
VREG5
VO2_IN
Function
Output for CH-2 error
amplifier
Output for CH-1 error
amplifier
Output for 5V regulator
Input for CH-2 feedback
voltage
Description
Output pin for CH-2 error amplifier. Connect a capacitor between
PC2 and GND for phase compensation.
Output pin for CH-1 error amplifier. Connect a resistor and a
capacitor between FB1 pin and INV1 pin for phase compensation.
Output pin for 5V regulator of the control circuit.
Connect an external capacitor (10µF).
Feedback voltage input pin for CH-2.
CH-2 is controlled so that VO2_IN pin becomes 3.3V.
Inverting input for CH-1 error amplifier. In fixed output voltage
mode, connect a resistor and a capacitor for phase compensation.
In adjustable output voltage mode, connect resistors between the
output and INV1 pin, and between INV1 pin and GND, so that
this pin become 1.2V.
After positive charge pump started properly, this pin switches
5
INV1
Inverting input for CH-1
error amplifier
6
VGH_OK
VGH power good output
Input for load switch
control
Output for CH-2 power
good
Reference voltage
Test pin
from Low level to High level. Connect an external pull-up
resistor.
7
8
PG_LOGIC
VO2_OK
Input pin for controlling LSW_OUT2.
After CH-2 started properly, this pin switches from Low level to
High level. Connect an external pull-up resistor.
1.2V reference voltage for feedback of negative voltage charge
pump.
Connect an external capacitor (0.01µF) for the stability.
Used for the production test before shipment. Connect to GND.
SYSUVLO pin shuts down the operation of IC, when the power
supply voltage drops below regulated value. Resistors are
9
10
VREF
TEST
11
SYSUVLO
Input for System
UVLO
internally connected between VCC pin and SYSUVLO pin, and
between SYSUVLO pin and GND. It is possible to set the
detection voltage at any value by connecting external resister
divider to SYSUVLO pin.
When Low level voltage is applied to PANEL_EN pin, negative
voltage charge pump, Load Switch 1 and positive voltage charge
pump stop their operations. If not in use, connect to VREG5 pin.
No connection. Leave open.
LDO inverting input. The voltage on this pin is 1.2V in the
normal operation.
Ground pin for the control circuit block.
Power supply pin for LDO amplifier.
12
13
14
15
16
17
PANEL_EN
Input
for
Panel
power
supply enable
NC
LDO amplifier inverting
input
Ground for signal
Power supply for LDO
NC
INV_LDO
SGND
V_LDO
Copyright© 2011 THine Electronics, Inc.
THine Electronics, Inc.
4/19
THINE [ THINE ELECTRONICS, INC. ]
