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参数资料
| 型号： | EPL43102 |
| 英文描述： | Graphic STN LCD Drivers with Built-in RAM |
| 中文描述： | 图形STN液晶显示器驱动器，内置内存 |
| 文件页数： | 22/64页 |
| 文件大小： | 280K |
| 代理商： | EPL43102 |
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43 COM / 102 SEG LCD DRIVER
The information in this document is subject to change without notice.
24
Voltage converter circuits
These circuits boost up the electric potential between VDD and VSS to 2, 3, 4, or 5 times
toward positive side and boosted voltage is outputted from VOUT pin. The boosting
magnitude of internal booster circuit is selected by the capacitor connection (Refer
Figure 15). The internal oscillator is required to be operating when using this converter,
because the divided signal provided from the oscillator is used for the internal timing of
this circuit.
Figure 15
Voltage regulator circuits
The voltage regulator determines the LCD driving voltage V0, by adjusting resistors, Ra
and Rb, within the range of |V0| < |VOUT|. Because VOUT is the operating voltage of
operational-amplifier circuits, it is necessary to be applied internally or externally. For the
Eq. 1, we determine V0 by Ra, Rb and VEV. The Ra and Rb are connected internally or
externally by IRS pin. And VEV called the voltage of electronic volume is determined by
Eq. 2, where the parameter
α is the value selected by instruction, "Set Contrast Control
Mode", within the range 0 to 63.
VREF, a constant voltage source is 2 V at TA=25
oC.
C1+
C1-
C3
C4
C2-
C2+
VOUT
OPEN
C1+
C1-
C3
C4
C2-
C2+
VOUT
OPEN
C1+
C1-
C3
C4
C2-
C2+
VOUT
C1+
C1-
C3
C4
C2-
C2+
VOUT
2X
3X
4X
5X
Boost Capacitors = 1 uF~4.7 uF
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| EPL6024-102MEC | 功能描述:固定电感器 Power Inductor 1 uH 20 % 12.5 A RoHS:否 制造商:AVX 电感:10 uH 容差:20 % 最大直流电流:1 A 最大直流电阻:0.075 Ohms 工作温度范围:- 40 C to + 85 C 自谐振频率:38 MHz Q 最小值:40 尺寸:4.45 mm W x 6.6 mm L x 2.92 mm H 屏蔽:Shielded 端接类型:SMD/SMT 封装 / 箱体:6.6 mm x 4.45 mm |
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