THV3056_Rev.2.00_E
Pin Description
Pin#
Symbol
Function
ch-1,ch-2,ch-3
Description
10
12
14
FB1
FB2
FB3
Ch-1,2,3 error amplifier outputs for phase compensation by connecting
resistors and capacitors between FB_1,2,3 and INV_1,2,3.
error amplifier output
11
13
15
INV1
INV2
INV3
ch-1,ch-2,ch3 error ampli-
fier inverting input
Ch-1,2,3 error amp inverting inputs. The voltage on INV1 and INV3 are
1.2V, and INV2 is 0.85V, in the normal operation.
Soft start pin for ch-1/2/3. Voltage at power-on is ground level. Constant
1mA current source charges capacitors connected to these pins. Soft
start time can be adjusted by external capacitors connected these pins.
On/Off control is available by connecting the external open drain ports
or PG pins.
18
19
20
SS1
SS2
SS3
ch-1,ch-2,ch-3 soft start
23
24
25
DTC1
DTC2
DTC3
ch-1,ch-2,ch-3
Dead Time Control
To limit the maximum duty cycle on ch-1,2,3.
See Functional Description “DTC” for detail.
Ch-1 external PMOS switch for soft start. Voltage at power-on is
ground level. Constant 1mA current source charges the capacitor con-
nected to this pin. Soft start time of PMOS transistor to VO_1SW can be
adjusted by external capacitors connected this pin. On/Off control is
available by connecting the external open drain ports or PG pins.
ch-1 soft start of external
PMOS switch
17
SS_SW
VGH comparator invert-
ing input
VGH comparator inverting input.
The voltage on this pin is 1.2V in the normal operation.
46
48
INV_VGH
NON_VGL
VGL comparator non-
inverting input
VGL comparator non-inverting input.
The voltage on this pin is 0V in the normal operation.
VGH
VGH, VHL charge pump control pins. When the input voltage is High
level, these pins are On state. Low level, Off state.
Using as charge pump, please set the duty cycle of 50%.
In PFM mode, these pin operate as DTC.
(charge pump +)control
VGL
(charge pump -)control
26
27
DTC_VGH
DTC_VGL
See Functional Description “DTC” for detail.
Reference voltage of 1.2V. Connect this pin with an external capacitor
of 0.01uF for stability.
The maximum load current is 1mA.
22
VREF
Reference voltage
Startup sequence select
Two type of startup sequence are selectable by connecting SEL1 pin to
GND or VREG5 pin. See Functional Description “Startup Sequence”.
4
5
SEL1
SEL2
V_VC
Charge pump UVP timer latch Charge pump UVP timer latch On/Off control is available by SEL2 pin.
On/Off control
See Functional Description “SCP” for detail.
Voltage supply
for Vcom output
41
Voltage supply for Vcom output.
UVP voltage can be set optionally by connecting an external resistor to
this pin. Without external resistor, UVP voltage is set at 50% of the ref-
erence voltage.
UVP voltage of VGL set pin
47
VGL_UVP
4/32
THine Electronics, Inc.
Copyright©2010 THine Electronics, Inc.
THINE [ THINE ELECTRONICS, INC. ]
