TPS61187 Series
WLED driver for notebooks with PWM interface and Auto Phase Shift function
Manufacturer: Texas Instruments
Catalog(1 parts)
| Part | Voltage - Supply (Max)▲▼ | Type | Voltage - Supply (Min)▲▼ | Number of Outputs▲▼ | Mounting Type | Internal Switch(s)▲▼ | Supplier Device Package | Operating Temperature▲▼ | Operating Temperature▲▼ | Voltage - Output▲▼ | Frequency▲▼ | Current - Output / Channel▲▼ | Dimming | Package / Case | Topology | Applications |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Texas Instruments TPS61187RTJTLED Driver IC 6 Output DC DC Regulator Step-Up (Boost) PWM Dimming 30mA 20-QFN (4x4) | 24 V | DC DC Regulator | 4.5 V | 6 ul | Surface Mount | 20-QFN (4x4) | 85 °C | -40 °C | 38 V | 1000000 Hz | 0.029999999329447743 A | PWM | 20-WFQFN Exposed Pad | Step-Up (Boost) | Backlight |
Key Features
• Input Voltage 4.5 V to 24 VMaximum Output Voltage 38 VIntegrated 2-A, 40-V MOSFETProgrammable Switching Frequency 300 kHz to 1 MHzAdaptive Boost Output to WLED VoltagesWide PWM Dimming Frequency Range100 Hz to 50 KHz for Direct PWM Mode100 Hz to 22 KHz for Frequency Programmable Mode100:1 Dimming Ratio at 20 kHz10000:1 Dimming Ratio at 200 Hz (Direct PWM mode)Small External ComponentsIntegrated Loop CompensationSix Current Sinks of 30 mA Maximum1.5% (Typical) Current MatchingPWM Brightness Interface ControlPWM Phase Shift Mode Brightness Dimming Method or Direct PWM Dimming MethodHBM ESD Protection 4 kVProgrammable Overvoltage ThresholdBuilt-in WLED Open/Short ProtectionThermal ShutdownInput Voltage 4.5 V to 24 VMaximum Output Voltage 38 VIntegrated 2-A, 40-V MOSFETProgrammable Switching Frequency 300 kHz to 1 MHzAdaptive Boost Output to WLED VoltagesWide PWM Dimming Frequency Range100 Hz to 50 KHz for Direct PWM Mode100 Hz to 22 KHz for Frequency Programmable Mode100:1 Dimming Ratio at 20 kHz10000:1 Dimming Ratio at 200 Hz (Direct PWM mode)Small External ComponentsIntegrated Loop CompensationSix Current Sinks of 30 mA Maximum1.5% (Typical) Current MatchingPWM Brightness Interface ControlPWM Phase Shift Mode Brightness Dimming Method or Direct PWM Dimming MethodHBM ESD Protection 4 kVProgrammable Overvoltage ThresholdBuilt-in WLED Open/Short ProtectionThermal Shutdown
Description
AI
The TPS61187 device provides a highly integrated white-light-emitting-diode (WLED) driver solution for notebook LCD backlight. This device has a built-in high efficiency boost regulator with integrated 2-A, 40-V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 60 WLEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to optimize efficiency.
The TPS61187 supports the automatic phase-shift-dimming method and direct-PWM-dimming method. During phase-shift-PWM dimming, the WLED current is turned on and turned off at the duty cycle controlled by the input PWM signal, and each channel is shifted according to the frequency determined by an integrated pulse-width-modulation (PWM) signal. The frequency of this signal is resistor programmable, while the duty cycle is controlled directly from an external PWM signal input to the PWM pin. During direct PWM dimming, the WLED current is turned on and/or turned off synchronized with the input PWM signal.
The TPS61187 device provides a highly integrated white-light-emitting-diode (WLED) driver solution for notebook LCD backlight. This device has a built-in high efficiency boost regulator with integrated 2-A, 40-V power MOSFET. The six current sink regulators provide high precision current regulation and matching. In total, the device can support up to 60 WLEDs. In addition, the boost output automatically adjusts its voltage to the WLED forward voltage to optimize efficiency.
The TPS61187 supports the automatic phase-shift-dimming method and direct-PWM-dimming method. During phase-shift-PWM dimming, the WLED current is turned on and turned off at the duty cycle controlled by the input PWM signal, and each channel is shifted according to the frequency determined by an integrated pulse-width-modulation (PWM) signal. The frequency of this signal is resistor programmable, while the duty cycle is controlled directly from an external PWM signal input to the PWM pin. During direct PWM dimming, the WLED current is turned on and/or turned off synchronized with the input PWM signal.