SSD0817Z(2002) View Datasheet(PDF) - Solomon Systech

Part Name

Description

Manufacturer

SSD0817Z
(Rev.:2002)

LCD Segment / Common Driver with Controller

Solomon Systech  

LCD Driving Voltage Generator and Regulator

This module generates the LCD voltage required for display driving output. With reference to VDD, it takes

a single supply input, VSS, and generates all the necessary voltage levels. This block consists of:

1. 2X, 3X, 4X and 5X DC-DC voltage converter

The built-in DC-DC voltage converter is used to generate the negative voltage with reference to VDD from

the voltage input (VSS1). For SSD0817, it is possible to produce 2X, 3X, 4X or 5X boosting from the

potential different between VSS1 - VDD. Detailed configurations of the DC-DC converter for different

boosting multiples are given in Figure 3.

VSS1 VEE

SSD0817

C3N C1P

C1N

C2N C2P C4N

+

C1

C1+ +C1

C1+ +C1

5X Boosting Configuration

VSS1 VEE

SSD0817

C3N C1P C1N

C2N C2P C4N

+ C1

++

C1

C1

+

C1

4X Boosting Configuration

VSS1 VEE C3N

SSD0817

C1P C1N

C2N C2P C4N

+ C1

+ C1

C1 +

3X Boosting Configuration

VSS1 VEE C3N

SSD0817

C1P C1N

C2N C2P C4N

+ C1

+ C1

2X Boosting Configuration

Remarks:

1. C1= 0.47 – 1.0uF

2. Boosting input from VSS1

3. VSS1 should be lower potential than or equal to VSS

4. All voltages are referenced to VDD

Figure 3 - DC-DC Converter Configurations

2. Voltage Regulator (Voltages referenced to VDD)

Internal (IRS pin = H) feedback gain can control the LCD driving contrast curves.

If internal resistor network is enabled, eight settings can be selected through software command.

13

SSD0817 Series

Rev 1.0

03/2002

SOLOMON

Share Link: