ILD4035 Infineon Technologies, ILD4035 Datasheet - Page 9

• Manufacturer Part Number: ILD4035
• Manufacturer: Infineon Technologies
• Type: Buckr

Specifications of ILD4035

• Packages: SC74
• Vs (min): 4.5 V
• Vs (max): 40.0 V
• Iout (typ): 350.0 mA
• Iout (max): 400.0 mA

2
The ILD4035 is a hysteretic step down LED driver IC for general lighting applications, which is capable to drive
high power LEDs with average currents up to 400 mA.
The IC incorporates a wide input voltage range and an internal power switch. The output current level can be
adjusted with an external sense resistor.
According to the multifunctional control pin the IC can be switched on and off by an external signal, which is also
suitable to regulate brightness of the LEDs by PWM or analog voltage dimming.
Depending on the value of the switching inductor the switching frequency and the voltage ripple can be set.
The precise internal bandgap stabilizes the circuit and provides stable current conditions over temperature range.
To ensure a long lifetime of the LED system, the ILD4035 incorporates an overvoltage and an overcurrent
protection.
In addition, the integrated thermal protection will reduce the output current to protect the LEDs and the IC against
thermal stress.
Figure 1
Data Sheet
Product Brief
Block Diagram
PWM
GND
EN /
V
S
1
2
3
Vref
Over Voltage Protection
Vstab
Vstab
Buck LED Converter
ILD4035
9
Over Current Protection
Vstab
Vstab
TPC
I / V
Vstab
350 mA Step Down LED Driver
ILD4035_ Block diagram.vsd
6
5
4
V
GND
V
sense
switch
Revision 2.0, 2011-08-17
Product Brief
ILD4035