UPD161644P データシートの表示（PDF） - NEC => Renesas Technology

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UPD161644P

241 OUTPUT GATE DRIVER WITH POWER SUPPLY FOR TFT-LCD GATE DRIVER

NEC => Renesas Technology 

µPD161644

3. PIN FUNCTIONS

(1/5)

Symbol

Pin Name

Pad No.

I/O

Function

VDC

DC/DC converter

93 to 100

reference voltage

− Reference voltage input pin for DC/DC converter.

VCC1

Logic reference

voltage

101 to 104

− 2.5 to 3.3 V LS (level shifter) reference voltage input pin.

VSS1

Ground

88 to 91,

105 to 110

− Connect to the system ground.

VGD

Power supply input 114 to 116

for DC/DC converter

Input Reference voltage input pin for VDD1, VSS1 to VSS4 boost.

Connect to any of VDD2, VR or VS.

VDD1

DC/DC converter

output

65 to 67

Output Boost output voltage of DC/DC converter (VGD x 2 or x 3).

The boost step number of VDD1 is selected according to how the

external capacitor is connected. The boost reference voltage can

be set using VGD. Refer to the function of VGD pin.

VDD2

DC/DC converter

output

84 to 87

Output Boost output voltage of DC/DC converter (VDC x 2 or x 3). The

boost step number of VDD2 can be set using VCD2.

VSS2

DC/DC converter

output

46 to 48

Output Boost output voltage of DC/DC converter (VGD x −1 or x −2).

The boost step number of VSS2 is selected according to how the

external capacitor is connected. The boost reference voltage can

be set using VGD. Refer to the function of VGD pin.

VSS3

DC/DC converter

output

40 to 42, 143

Output Boost output voltage of DC/DC converter (VGD x −2 or x −3).

The boost step number of VSS3 is selected according to how the

external capacitor is connected. The boost reference voltage can

be set using VGD. Refer to VGD pin function.

VSS4

DC/DC converter

output

43 to 45

Output Boost output voltage of DC/DC converter (VDC x −1).

VM

Gate output low

36, 37

level select voltage

Output

The voltage level of VSS2 or VSS3 is output synchronized with the

VCIN input.

VCIN = 0: Output the voltage level of VSS3

VCIN = 1: Output the voltage level of VSS2

The timing chart is shown in Figure 3-1.

VB

C1 +, C1 −

C2 +, C2 −

C3 +, C3 −

C4 +, C4 −

C5 +, C5 −

C6 +, C6 −

Driver negative

voltage

Capacitor connect

pin for boost

38, 39

Input Negative voltage of output buffer. This is the input pin of the

liquid crystal driver negative voltage. Input the negative power

supply of the gate output. VB pin connection examples are

shown in Figure 3-2.

80 to 83, 76 to 79, Output To connect booster for DC/DC converter.

72 to 75, 68 to 71,

For the recommended values of the capacitance and

63, 64, 61, 62,

withstanding voltage of each capacitor, refer to

59, 60, 57, 58,

9. RECOMMENDED CAPACITANCE VALUES OF EXTERNAL

55, 56, 53, 54,

CAPACITOR.

51, 52, 49, 50

VR

Power supply

111 to 113

Output Positive power supply voltage output for the DC/DC converter.

output for DC/DC

The VR output voltage can be changed by setting VRSEL0 to

converter

VRSEL2.

10

Preliminary Product Information S15797EJ1V4PM

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