IC specification
MLX10803
High power LED driver
3901010803 Page 7/25
Data Sheet
Rev026 Jun/2012
2. Application pins
Nr.
Name Function
1 VREF Analogue input, setting of LED peak current
2 ROSC External resistor sets internal Oscillator frequency. Sets the average discharge time of the coil
3 IREF1 External NTC resistor for temperature down regulation
4 IREF2 External resistor sets the temperature breakpoint when the NTC resistor starts down regulation
5 RSENSE External sense resistor pin for peak current detection
6 GND Ground
7 DRVGATE Pin driving the gate of the switching transistor
8 VS/PWM Supply Voltage / PWM signal
3. Absolute maximum ratings
Power supply (VS/PWM) vs DC
max. 2h
-0.3
-0.3
32
36
V
V
Power supply, non operational function
max. 0.5s (Load dump)
vsmax
max 0.5s
36
80
V
Input current in protection circuitry on any pin iprot In case of
maximum
supply ratings
-10 10 mA
Input voltage on RSENSE pin virsense normal
operation
-0.3 11
Input voltage on IREF1, IREF2, VREF pins vrefmax without external
resistor
protected by
external 47k
resistor
-0.3
-80
(0.5s)
40
80
(0.5s)
V
V
Input voltage on ROSC pin vroscmax normal
operation
-0.3 Vdd+0.3 V
Input voltage on DRVGATE pin vdrvgatmax idrvgatemax
current must
not be
exceeded
-0.3 22 V
Input/output current on DRVGATE pin idrgatemax pulse mode 500 mA
Junction temperature
Lifetime
Dynamic
Storage temperature
Tjunc
normal
operation.
max. 100h
-40
-40
-55
140
150
150
°C
Ambient temperature range Tambient normal
operation
-40 125 °C
Thermal resistance junction to ambient rth SOIC8 128.4 K/W
