Overview
The LP5522TMX/NOPB is a programmable LED driver from Texas Instruments, designed to provide a simple and efficient solution for controlling LEDs in various applications. This device is packaged in a six-bump DSBGA (Dual-Side Bump Grid Array) package, making it highly suitable for space-constrained designs. The LP5522 operates as a constant current source, allowing for adjustable output current through an external resistor. It can be controlled using a single digital input, making it versatile for use in handheld devices, phone cosmetics, and other consumer electronics.
Key Specifications
| Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|
| Voltage on power pin (VDD) | 2.7 | 5.5 | V | |
| Output Current | 1 | 5 | 20 | mA |
| Junction Temperature (TJ) Range | -30 | 125 | °C | |
| Ambient Temperature (TA) Range | -30 | 85 | °C | |
| LED On Time | 1 ms | 255 ms | ||
| LED Off Time | 10 ms | 2500 ms | ||
| Standby Supply Current | 0.2 | 1 | µA | |
| Active Mode Supply Current | 40 | 55 | µA | |
| Minimum Headroom Voltage | 35 | 50 | mV | |
| Package Dimensions | 1.215 mm x 0.815 mm x 0.6 mm |
Key Features
- Single wire programmable LED controller
- Constant current high side output driver
- Adjustable current with external resistor (1 mA to 20 mA)
- Autonomous operation without external clock
- Very low shutdown current (0.2 µA typical)
- Programmable blinking sequence with 1 to 3 pulses
- LED on time: 1 ms to 255 ms, LED off time: 10 ms to 2500 ms
- Small DSBGA-6 package with 0.4 mm pitch
Applications
- Indicator lights
- Phone cosmetics
- Toys and other handheld devices
- Consumer electronics requiring LED control
Q & A
- What is the package type of the LP5522TMX/NOPB? The LP5522TMX/NOPB is packaged in a six-bump DSBGA (Dual-Side Bump Grid Array) package.
- How is the output current adjusted? The output current can be adjusted using an external resistor on the ISET pin, allowing for currents from 1 mA to 20 mA.
- What is the typical standby supply current? The typical standby supply current is 0.2 µA.
- Can the LP5522 operate autonomously? Yes, the LP5522 can operate autonomously without an external clock signal.
- What is the minimum headroom voltage required? The minimum headroom voltage required is 35 mV to 50 mV.
- How is the blinking sequence programmed? The blinking sequence is programmed using a single digital control input (CTRL), with up to three programmable pulses.
- What are the typical operating temperature ranges? The junction temperature range is -30°C to 125°C, and the ambient temperature range is -30°C to 85°C.
- What is the maximum LED forward voltage allowed? The maximum LED forward voltage must be less than the minimum input voltage minus the minimum headroom voltage.
- Is the device RoHS compliant? Yes, the LP5522TMX/NOPB is RoHS compliant.
- What are some recommended external components? Recommended external components include a surface-mount multi-layer ceramic capacitor (MLCC) for the input capacitor and a 1% or better accuracy resistor for the current set resistor.
