THV3056 datasheet(4/32 Pages) THINE

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THV3056_Rev.2.00_E

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THine Electronics, Inc.

Pin#

Symbol

Function

Description

FB1

FB2

FB3

ch-1,ch-2,ch-3

error amplifier output

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.

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.

SS1

SS2

SS3

ch-1,ch-2,ch-3 soft start

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.

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.

SS_SW

ch-1 soft start of external

PMOS switch

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.

INV_VGH

VGH comparator invert-

ing input

VGH comparator inverting input.

The voltage on this pin is 1.2V in the normal operation.

NON_VGL

VGL comparator non-

inverting input

VGL comparator non-inverting input.

The voltage on this pin is 0V in the normal operation.

DTC_VGH

DTC_VGL

VGH

(charge pump +)control

VGL

(charge pump -)control

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.

See Functional Description “DTC” for detail.

VREF

Reference voltage

Reference voltage of 1.2V. Connect this pin with an external capacitor

of 0.01uF for stability.

The maximum load current is 1mA.

SEL1

Startup sequence select

Two type of startup sequence are selectable by connecting SEL1 pin to

GND or VREG5 pin. See Functional Description “Startup Sequence”.

SEL2

Charge pump UVP timer latch

On/Off control

Charge pump UVP timer latch On/Off control is available by SEL2 pin.

See Functional Description “SCP” for detail.

V_VC

Voltage supply

for Vcom output

Voltage supply for Vcom output.

VGL_UVP

UVP voltage of VGL set pin

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.

Pin Description

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