UPD16732AN-XXX 데이터 시트보기 (PDF) - NEC => Renesas Technology

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UPD16732AN-XXX

384-OUTPUT TFT-LCD SOURCE DRIVER (COMPATIBLE WITH 64-GRAY SCALES)

NEC => Renesas Technology 

µ PD16732A, 16732B

9. CURRENT CONSUMPTION REDUCTION FUNCTION

The µ PD16732A and 16732B have a low power control function (LPC) which can switch the bias current of the

output amplifier between two levels and a bias control function (Bcont) which can be used to finely control the bias

current.

<Low power control function (LPC)>

The bias current of the output amplifier can be switched between two levels using this pin. (Bcont: Open)

LPC = H or Open: Normal power mode

LPC = L: Low power mode

5 The VDD2 of static current consumption can be reduced to two thirds of that in normal mode. Input a stable DC

current (VDD1/VSS1) to this pin.

<Bias Current Control Function (Bcont)>

It is possible to fine-control the current consumption by using the bias current control function (Bcont pin). When

using this function, connect this pin to the stabilized ground potential (VSS2) via an external resistor (REXT). When

not using this function, leave this pin open.

Refer to the table below for the percentage of current regulation when using the bias current control function.

Figure9−1. Bias Current Control Function (Bcont)

µ PD16732A,16732B

Bcont

LPC

REXT

H/L

VSS2

Refer to the table below for the percentage of current regulation when using the bias current control function.

5

Talbe9−1. Current Consumption Regulation Percentage Compared to Normal Mode

REXT

∞ (Open)

50 kΩ

20 kΩ

10 kΩ

Current Consumption Regulation Percentage

LPC = H

LPC = L

100 %

65 %

110 %

70 %

115 %

80 %

120 %

85 %

VDD1 = 3.3 V

VDD2 = 8.7 V

LPC = 3.3 V/0 V

Remark The above current consumption regulation percentages are not product-characteristic guaranteed as they

are based on the results of simulation.

Caution

Because the low-power and bias-current control functions control the bias current in the output

amplifier and regulate the over-all current consumption of the driver IC, when this occurs, the

characteristics of the output amplifier will simultaneously change. Therefore, when using these

functions, be sure to sufficiently evaluate the picture quality.

Data Sheet S13972EJ3V0DS00

11

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