King Billion Electronics Co., Ltd

駿

億

電

子

股

份

有

限

公

司

HE847701

HE80000 SERIES

March 26, 2004

Page 12 of 29

V1.03

This specification is subject to change without notice. Please contact sales person for the latest version before use.

Voltage charge pump: The LVL2 is then pumped to LVL5 based on the bias setting of MO_LBSR[3..0].

The formula for LVL5 is:

LVL5 = LVL2 / 2 x (1/Bias)

The potential difference between bias voltages LVL1 ~ LVL5 is determined by the bias settings, too.

LVL5

LVL4

LVL3

LVL2

LVL1

1

1

1

1

3 ~ 6.5

Voltage

Ratio

Difference

For example, if the bias setting is 1/7 bias and LVL2 is 2 volts, the LVL5 will be pumped to 7 volts when

the load is light.

Bias

5.0

5.5

6.0

6.5

7.0

7.5

8.0

8.5

9.0

9.5 10.0

Min. VDD LVL2

LVL5 = LCD Panel Operating Voltage

2.70

2.40 6.00 6.60 7.20 7.80 8.40

2.60

2.30 5.75 6.33 6.90 7.48 8.05

2.50

2.20 5.50 6.05 6.60 7.15 7.70 8.25

2.40

2.10 5.25 5.78 6.30 6.83 7.35 7.88 8.40

2.30

2.00 5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50

2.20

1.90 4.75 5.23 5.70 6.18 6.65 7.13 7.60 8.08 8.55

2.10

1.80 4.50 4.95 5.40 5.85 6.30 6.75 7.20 7.65 8.10 8.55

2.00

1.70 4.25 4.68 5.10 5.53 5.95 6.38 6.80 7.23 7.65 8.08 8.5

Please note that external connections of charge pump capacitors must be made according to the bias

setting, too. Please use the following figure as reference when designing application circuit and LVL5

must be lower than 8.5 volts to prevent chip from breaking down.