Overview
The TPS65140PWPRG4 is a triple output LCD supply integrated circuit designed by Texas Instruments. This device is part of the TPS6514x series, which includes the TPS65140, TPS65141, and TPS65145. It is specifically tailored for applications requiring multiple regulated voltage outputs, particularly in LCD monitors and notebook displays. The TPS65140PWPRG4 operates from an input voltage range of 2.7 V to 5.8 V and features a fully integrated adjustable charge pump doubler or tripler for positive LCD gate drive voltage, as well as an externally adjustable negative charge pump for negative gate drive voltage.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.7 | - | 5.8 | V |
| Switch Current Limit | - | 2.3 | - | A |
| Switching Frequency of Charge Pumps | - | 1.6 MHz | - | - |
| Power Good Threshold (VO1) | -12% | -8.75% | -6 V | % of VO1 |
| Power Good Threshold (VO2) | -13% | -9.5% | -5 V | % of VO2 |
| Power Good Threshold (VO3) | -11% | -8% | -5 V | % of VO3 |
| PG Output Low Voltage (I(sink) = 500 μA) | 0.3 | - | - | V |
| PG Output Leakage Current (VPG = 5 V) | 0.001 | 1 | - | μA |
| Package Type | - | HTSSOP (24), VQFN (24) | - | - |
| Package Size | - | 7.80 mm × 4.40 mm (HTSSOP), 4.00 mm × 4.00 mm (VQFN) | - | - |
Key Features
- Fully integrated adjustable charge pump doubler or tripler for positive LCD gate drive voltage and externally adjustable negative charge pump for negative gate drive voltage.
- High switching frequency of 1.6 MHz for charge pumps, allowing the use of small 220-nF capacitors.
- System power good output to indicate when all supply rails are acceptable.
- Linear regulator controller using an external transistor to provide a regulated 3.3-V output for digital circuits.
- Shutdown feature for maximum safety when one of the outputs is out of regulation (except for TPS65141).
- Available in HTSSOP (24) and VQFN (24) packages.
Applications
- LCD monitors
- Notebook displays
- Other LCD panel applications requiring multiple regulated voltage outputs
Q & A
- What is the input voltage range of the TPS65140PWPRG4?
The input voltage range is from 2.7 V to 5.8 V.
- What is the typical switch current limit of the TPS65140PWPRG4?
The typical switch current limit is 2.3 A.
- What is the switching frequency of the charge pumps in the TPS65140PWPRG4?
The switching frequency is 1.6 MHz.
- How does the power good output function in the TPS65140PWPRG4?
The power good output goes high when all three outputs (VO1, VO2, VO3) are above their threshold and goes low as soon as one of the outputs is below its threshold.
- What type of packages is the TPS65140PWPRG4 available in?
The device is available in HTSSOP (24) and VQFN (24) packages.
- What is the purpose of the linear regulator controller in the TPS65140PWPRG4?
The linear regulator controller uses an external transistor to provide a regulated 3.3-V output for digital circuits.
- Does the TPS65140PWPRG4 have a shutdown feature?
Yes, the device goes into shutdown as soon as one of the outputs is out of regulation, except for the TPS65141.
- How can the device be enabled again after shutdown?
The device can be enabled again by toggling the input or the enable (EN) pin to GND.
- What are the typical applications of the TPS65140PWPRG4?
The device is typically used in LCD monitors and notebook displays.
- What is the significance of the high switching frequency of the charge pumps?
The high switching frequency allows the use of small and inexpensive 220-nF capacitors.
