Overview
The LED1202QTR, produced by STMicroelectronics, is a 12-channel low quiescent current LED driver. It is designed to provide a high level of flexibility and control in LED lighting applications. The device guarantees a 5 V output driving capability, with each channel capable of providing up to 20 mA of current. It features a low headroom voltage of 350 mV (typical) and supports both 8-bit analog and 12-bit digital dimming control for each channel. The LED1202QTR also includes advanced features such as slow turn-on and turn-off times to reduce noise, phase shifting to minimize inrush current, and internal registers for storing up to eight programmable patterns for automatic sequencing without MCU intervention.
Key Specifications
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| Operating Input Voltage (VIN) | 2.6 | 5 | V | |
| Quiescent Current (EN='0') | 4 | 8 | µA | |
| Supply Current (EN='1', ICS0-CS11 = 16 mA) | 0.8 | 2.0 | mA | |
| Output Current per Channel | 20 | mA | ||
| Current Matching at 16 mA | 1% | |||
| Current Matching at 2.5 mA | 2% | |||
| I²C Clock Frequency | 400 kHz | |||
| Package Types | WLCSP20, QFN20 3x3 |
Key Features
- Supply range from 2.6 V to 5 V
- 12 channels for single LED, each capable of up to 20 mA current
- 1% (typ.) current matching at 16 mA and 2% (typ.) at 2.5 mA
- 1.8 V compatible I²C control interface up to 400 kHz
- 8-bit analog dimming individual control and 12-bit local PWM resolution
- 8 programmable patterns and programmable pattern sequence
- Synchronization for multi-device applications and phase shifting between channels
- Open LED detection and overtemperature protection
- 8 configurable I²C slave addresses plus global address and fault flag pin
- Slow turn-on and turn-off times to reduce noise
Applications
- RGB LED lighting
- Fade-in and fade-out breathing effects
- Indicator lights for wearable electronics, battery-powered devices, and portable accessories
- Communications equipment, computers, and peripherals
- Industrial and personal electronics
Q & A
- What is the maximum current each channel of the LED1202QTR can provide?
Each channel can provide up to 20 mA of current.
- What is the operating input voltage range for the LED1202QTR?
The operating input voltage range is from 2.6 V to 5 V.
- How many programmable patterns can the LED1202QTR store?
The device can store up to eight programmable patterns.
- What is the I²C clock frequency supported by the LED1202QTR?
The I²C interface works up to 400 kHz.
- Does the LED1202QTR support multi-device synchronization?
- What types of packages are available for the LED1202QTR?
The device is available in WLCSP20 and QFN20 3x3 packages.
- What safety features does the LED1202QTR include?
The device includes thermal shutdown, overtemperature protection, and open LED detection.
- How many I²C addresses can be configured for the LED1202QTR?
Up to eight different local I²C addresses can be selected, plus a global address.
- What is the purpose of the phase shifting feature in the LED1202QTR?
The phase shifting feature helps to reduce the inrush current by offsetting the switching of individual LEDs.
- Can the LED1202QTR be used in applications requiring smooth brightness transitions?
