HE84760 Datasheet, PDF (12/31 Pages) King blillion Electronics Co.,Ltd. – 8-bit Micro-controller

King Billion Electronics Co., Ltd
駿億電子股份有限公司
HE84760
HE80000 SERIES
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.
Voltage
Difference
Ratio
1
1
3 ~ 6.5
1
1
LVL5
LVL4
LVL3
LVL2
LVL1
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.
August 15, 2003
Page 12 of 31
V1.2
This specification is subject to change without notice. Please contact sales person for the latest version before use.