Datasheet

8 Atmel LED Driver-MSL1060
Connection Descriptions
Table 3. Connection Assignments
NAME MSL1060 DESCRIPTION
VCC 1
6V internal linear regulator output
VCC powers the internal power FET switch driver.
Bypass VCC to GND either with a 10µF or greater ceramic capacitor.
If the voltage at VIN is less than 6.5V, connect VCC directly to VIN to bypass the internal linear
regulator, and power the driver directly from VIN
VDD 2
2.85V internal linear regulator output
VDD powers internal logic
Bypass VDD to GND with at least a 4.7µF ceramic capacitor
TEST1 3 Factory test connection. Leave unconnected
TEST2 4 Factory test connection. Connect to GND
TEST3 5 Factory test connection. Connect to GND
TEST4 6 Factory test connection. Connect to GND
PWM 7
PWM control input
Drive PWM with a PWM signal up to 40kHz to pulse-width-modulate the LED current
FLTB 8
Fault indication output (active low)
FLTB sinks current to GND whenever the MSL1060 detects a fault
Once a fault is detected, FLTB remains low until EN is toggled low/high, or input power is cycled off/on
OSC 9
Oscillator control input
Connect a 115kΩ, 1% resistor from OSC to GND to set the internal oscillator frequency which sets the
boost regulator switching frequency to 1.1MHz
ILED 10
Maximum LED current control input
Connect a resistor from ILED to GND to set the full-scale LED string current
For example, connect a 100kΩ resistor to GND to set a 20mA sink current through each LED string
IADJ 11
Analog LED current dimming input
Apply a voltage in the range of 0V to 1.22V to adjust LED current from 0 to 100%.
Use IADJ for ambient light sensing, temperature compensation, or other LED control functions
Connect IADJ to VDD if unused
STR5 12
LED String 5 current sink output
Connect the cathode of LED String 5 to STR5
Connect STR5 to GND if unused
STR4 13
LED String 4 current sink output
Connect the cathode of LED String 4 to STR4
Connect STR4 to GND if unused
STR3 14
LED String 3 current sink output
Connect the cathode of LED String 3 to STR3
Connect STR3 to GND if unused
STR2 15
LED String 2 current sink output
Connect the cathode of LED String 2 to STR2
Connect STR2 to GND if unused
STR1 16
LED String 1 current sink output
Connect the cathode of LED String 1 to STR1
Connect STR1 to GND if unused
STR0 17
LED String 0 current sink output
Connect the cathode of LED String 0 to STR0
Connect STR0 to GND if unused