2-Channel and 3-Channel Charge-Sharing - Texas Instruments
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TPS65197, TPS65197B
SLVSBB0D – APRIL 2012 – REVISED FEBRUARY 2018
TPS65197x: 8-Channel Level-Shifter Supporting No, 2-Channel and 3-Channel Charge-Sharing with Panel Discharge to VGH during Shut-Down
1 Features
•1 8-Channel Level-Shifter (STV, RESET, 6 × CLK) • High Output-Voltage Level 16.
5 V to 45 V (VGH) • Low Output-Voltage Level Down to –20 V (VGL) • Selectable Charge-Sharing
– No Charge-Sharing – 2-Channel Charge-Sharing – 3-Channel Charge-Sharing • 2-Channel Panel Discharge • T-CON Failure Detection – TPS65197: Logic Resets by STV Pulse – TPS65197B: No Reset of the Logic • Latched Shut-Down Detection (Clocks to VGH) • Supports 100-kHz Clock Operating Frequency • 28-Pin 4-mm × 4-mm QFN Package
2 Applications
• Gate-in-Panel (GIP) LCD – Notebook – Monitor – TV
3 Description
The TPS65197/B is an 8-channel level-shifter with discharge function intended for use in LCD display applications such as Notebooks, Monitors and TVs.
The device converts the timing-controller (T-CON) logic-level signals to the high-level signals needed by the gate-in-panel (GIP) display.
The clock outputs, CLKOUTx, support normal level shifting operation and 2-channel or 3-channel chargesharing, which can be used to improve picture quality and power consumption.
At power down, all outputs follow their input signals as long as possible; when the discharge function is used, the outputs are pulled high (VGH).
The TPS65197 implements a logic reset to ignore wrong T-CON signals after the rising STV edge which forces all 6 output clocks to VGL1.
The next CLKIN1 rising edge unlocks the logic and enables normal operation.
The TPS65197B does not have the logic reset and always follows its input signals.
Device Information(1)
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS65197
WQFN (28)
4.
00 mm x 4.
00 mm
TPS65197B
WQFN (28)
4.
00 mm x 4.
00 mm
(1) For all available packages, see the orderable addendum at the en...
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