MAX8795A：TFT-LCD DC-DC Converter with Operational Amplifiers
TFT LCD, DC-DC Converter with a High-Performance Step-Up Regulator, Two Linear-Regulator Controllers, and High-Current Operational Amplifiers for Active-Matrix, Thin-Film Transistor (TFT) LCDs
The MAX8795A includes a high-performance step-up regulator, two linear-regulator controllers, and five high-current operational amplifiers for active-matrix, thin-film transistor (TFT), liquid-crystal displays (LCDs). Also included is a logic-controlled, high-voltage switch with adjustable delay. The step-up DC-DC converter provides the regulated supply voltage for the panel source driver ICs. The converter is a high-frequency (1.2MHz) current-mode regulator with an integrated 20V n-channel MOSFET that allows the use of ultra-small inductors and ceramic capacitors. It provides fast transient response to pulsed loads while achieving efficiencies over 85%. The gate-on and gate-off linear-regulator controllers provide regulated TFT gate-on and gate-off supplies using external charge pumps attached to the switching node. The MAX8795A includes five high-performance operational amplifiers. These amplifiers are designed to drive the LCD backplane (VCOM) and/or the gamma-correction divider string. The device features high output current (±130mA), fast slew rate (45V/µs), wide bandwidth (20MHz), and rail-to-rail inputs and outputs. The MAX8795A is available in a lead-free, 32-pin, thin QFN package with a maximum thickness of 0.8mm for ultra-thin LCD panels, as well as in a 32-pin LQFP package with 0.8mm pin pitch.
Key Features
| MAX8795A: Minimal Operating Circuit Applications/Uses
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DataSheet
| title | Download file |
|---|---|
| MAX8795A Data Sheet | MAX8795A.pdf |
Parametrics
| Part Number | Primary Topology | Monitor/Control Features | DC-DC/Power Features | LCD/LED/Flash/CCD Features | VIN (V) | VIN (V) | VOUT (V) | VOUT (V) | Max. IOUT (A) | Max. IOUT (A) | Oper. Freq. (kHz) | Package/Pins | Budgetary Price |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | min | max | See Notes | |||||||||
| MAX8795A | Step-Up | Output OVP Shutdown | Current Limit Fixed Freq./PWM Internal Switch Soft Start | TFT Bias VCOM Buffer | 2.5 | 6 | 3 | 18 | 0.5 | 0.5 | 1200 | LQFP/32 TQFN/32 | $2.31 @1k |
Quality and Environmental Data
Related Products
- MAX1543：TFT LCD DC-to-DC Converter with Operational Amplifiers
Ordering Information
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
|---|---|---|---|---|---|
| MAX8795AETJ+ | NRND | TQFN,;32 pin;26 mm² | -40°C to +85°C | Lead Free | |
| MAX8795AETJ+C7P | NRND | TQFN,;32 pin;26 mm² | -40°C to +85°C | Lead Free | |
| MAX8795AETJ+T | NRND | TQFN,;32 pin;26 mm² | -40°C to +85°C | Lead Free | |
| MAX8795AGCJ+ | NRND | LQFP,;32 pin;82.8 mm² | -40°C to +105°C | Lead Free | |
| MAX8795AGCJ+T | NRND | LQFP,;32 pin;82.8 mm² | -40°C to +105°C | Lead Free | |
| MAX8795AGCJ/V+ | Active | LQFP,;32 pin;82.8 mm² | -40°C to +105°C | Lead Free | |
| MAX8795AGCJ/V+GB | Last Time Buy | LQFP,;32 pin;82.8 mm² | -40°C to +105°C | Lead Free | |
| MAX8795AGCJ/V+T | Active | LQFP,;32 pin;82.8 mm² | -40°C to +105°C | Lead Free | |
| MAX8795AGCJ/V+TGB | No Longer Available | LQFP,;32 pin;82.8 mm² | -40°C to +85°C | Lead Free | |
| MAX8795AGTJ+ | NRND | TQFN,;32 pin;26 mm² | -40°C to +105°C | Lead Free | |
| Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
| MAX8795AGTJ+T | NRND | TQFN,;32 pin;26 mm² | -40°C to +105°C | Lead Free | |
| MAX8795AGTJ/V+ | Active | TQFN,;32 pin;26 mm² | -40°C to +105°C | Lead Free | |
| MAX8795AGTJ/V+CCJ | NRND | TQFN,;32 pin;26 mm² | -40°C to +105°C | Lead Free | |
| MAX8795AGTJ/V+T | Active | TQFN,;32 pin;26 mm² | -40°C to +105°C | Lead Free |
- MAX8795A.pdf MAX8795A
- MAX8795A.pdf MAX8795A
- MAX8795A.pdf MAX8795A
- MAX8795A.pdf MAX8795A
- 最简工作电路 MAX8795A
