Overview
The ADP8860ACBZ-R7, produced by Analog Devices Inc., is a highly integrated, 7-channel smart LED driver that combines a programmable backlight LED charge pump driver with automatic phototransistor control. This device is designed to optimize power savings by adjusting the current intensity based on ambient light conditions, eliminating the need for a processor to monitor the phototransistor. It features an I2C-compatible interface for all programming, dedicated reset pin, and built-in power-on reset (POR). The ADP8860ACBZ-R7 is particularly suited for mobile and small format display backlighting applications due to its efficient power management and compact packaging options.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Input Voltage Range | 2.5 V to 5.5 V | - |
| Undervoltage Lockout (UVLO) | 2.0 V | - |
| Switching Frequency | 0.8 MHz to 1.32 MHz | - |
| Duty Cycle | 50% | - |
| Maximum Drive Current (D1-D7) | 26.2 mA to 34.1 mA (typical 30 mA) | TJ = 25°C, VD1:D7 = 0.4 V |
| Maximum Drive Current (D7 only, 60 mA setting) | 52.5 mA to 67 mA (typical 60 mA) | TJ = 25°C, VD7 = 0.4 V |
| Standby Current | < 1 μA | VIN = 3.6 V, Bit nSTBY = 0, SCL = SDA = 0 V |
| Active Current | 4.5 mA to 7.2 mA | VIN = 3.6 V, Bit nSTBY = 1, IOUT = 0 mA, gain = 2× |
| I2C Interface Voltage Range | Up to 5.5 V | - |
| I2C Clock Frequency | Up to 400 kHz | - |
| Package Type | WLCSP, LFCSP | - |
Key Features
- Programmable maximum current limit (128 levels)
- 16 programmable fade in and fade out times (0.1 sec to 5.5 sec) with linear, square, or cubic rates
- Fading override and internal soft start to limit inrush currents
- Short-circuit, overvoltage, and overtemperature protection
- Input-to-output isolation during faults or shutdown
- Dedicated reset pin and built-in power-on reset (POR)
- I2C-compatible interface for all programming
- Automatic phototransistor control for ambient light detection
- Compact wafer level chip scale package (WLCSP) or lead frame chip scale package (LFCSP)
Applications
- Mobile display backlighting
- Mobile phone keypad backlighting
- Dual RGB backlighting
- LED indication
- General backlighting of small format displays
Q & A
- What is the input voltage range of the ADP8860ACBZ-R7? The input voltage range is from 2.5 V to 5.5 V.
- What is the typical maximum drive current for channels D1-D7? The typical maximum drive current for channels D1-D7 is 30 mA.
- What is the maximum drive current for channel D7 when set to 60 mA? The maximum drive current for channel D7 when set to 60 mA is 60 mA.
- What is the standby current consumption of the ADP8860ACBZ-R7? The standby current consumption is less than 1 μA.
- Does the ADP8860ACBZ-R7 have built-in protection features? Yes, it includes short-circuit, overvoltage, and overtemperature protection.
- How does the ADP8860ACBZ-R7 adjust for ambient light conditions? It adjusts the current intensity automatically using phototransistor control.
- What is the I2C clock frequency supported by the ADP8860ACBZ-R7? The I2C clock frequency supported is up to 400 kHz.
- What are the packaging options for the ADP8860ACBZ-R7? The packaging options include wafer level chip scale package (WLCSP) and lead frame chip scale package (LFCSP).
- What are some common applications of the ADP8860ACBZ-R7? Common applications include mobile display backlighting, mobile phone keypad backlighting, and general backlighting of small format displays.
- Does the ADP8860ACBZ-R7 support programmable fade in and fade out times? Yes, it supports 16 programmable fade in and fade out times with various rates.
