LED1202QTR

Part: LED1202 — STMicroelectronics

Type: 12-Channel LED Driver (I²C controlled)

Description: 2.6–5 V supply, 12-channel low quiescent current LED driver with 20 mA per channel, 8-bit analog and 12-bit PWM dimming, 350 mV typical headroom and I²C interface up to 400 kHz.

Operating Conditions:

• Supply voltage: 2.6–5 V
• Operating free-air temperature: -40 to +85 °C (junction -40 to +125 °C)
• Analog dimming range: 1–20 mA per channel
• I²C clock: up to 400 kHz

Absolute Maximum Ratings:

• Max supply voltage (VIN): 6 V
• Max voltage on CS0–CS11, SDA, SCL, IRQn, VLDO, A0, A1: 6 V
• Storage temperature: -55 to +150 °C
• ESD (HBM): ±2000 V

Key Specs:

• Quiescent current (EN=0): 4 μA typ, 8 μA max
• Supply current (EN=1, ICS = 16 mA): 0.8 mA typ, 2.0 mA max
• UVLO: rising 2.5 V max, falling 2.1 V min
• Minimum headroom voltage: 350 mV typ
• Current matching between channels: ±1% typ at 16 mA, ±2% typ at 2.5 mA (±3% max)
• Absolute channel accuracy: ±4% max at 16 mA, ±6% max at 2.5 mA
• PWM frequency: 220 Hz typ, 1/4095 duty step
• Thermal shutdown: 150 °C typ
• Open LED detection threshold: 100 mV typ
• LDO output: 1.8 V typ

Features:

• 12 channels for single LEDs, 20 mA capability per channel
• 1.8 V compatible I²C control interface
• 8-bit individual analog dimming and 12-bit local PWM resolution
• 8 programmable patterns with programmable pattern sequence
• Synchronization for multi-device applications
• Phase shifting between channels
• Open LED detection and overtemperature protection
• 8 configurable I²C slave addresses plus global address (5Ch)
• Fault flag pin (IRQn, open-drain)

Applications:

• RGB LED lighting, fade-in/fade-out breathing effects, indicator lights
• Wearable electronics
• Battery powered devices
• Portable accessories

Package:

• WLCSP20 (1.71 x 2.16 x 0.5 mm, 0.4 mm pitch)
• QFN20 3x3 (3 x 3 x 0.6 mm, 0.5 mm pitch)

• Supply range from 2.6 V to 5 V
• 12 channels for single LED
• 20 mA current capability per channel
• 1% (typ.) current matching at 16 mA and 2% (typ.) at 2.5 mA
• 1.8 V compatible I²C control interface
• 8-bit analog dimming individual control
• 12-bit local PWM resolution
• 8 programmable patterns
• Programmable pattern sequence
• Synchronization for multi-device application
• Phase shifting between channels
• Open LED detection
• Overtemperature protection
• 8 configurable I²C slave addresses plus global address
• Fault flag pin

• RGB LED lighting, fade-in and fade-out breathing effect, indicator lights for:
• -Wearable electronics
• -Battery powered devices
• -Portable accessories

WLCSP20 and QFN20 3x3 package pinout and pin description.

Table 4. LED1202 electrical characteristics V IN = 3.3 V, SDA, SCL and IRQn = 1.8 V, T a = 25 °C, RC load = 50 Ω//10 pF, unless otherwise specified.

Table 4. LED1202 electrical characteristics V IN = 3.3 V, SDA, SCL and IRQn = 1.8 V, T a = 25 °C, RC load = 50 Ω//10 pF, unless otherwise specified.

Table 2. Absolute maximum ratings

Note: Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied.

Table 3. Thermal data

Table 3. Thermal data

In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK ® packages, depending on their level of environmental compliance. ECOPACK ® specifications, grade definitions and product status are available at: www.st.com. ECOPACK ® is an ST trademark.