Datasheet

15Atmel LED Driver-MSL1060
Typical Application Circuit
COMPONENT DESCRIPTION VENDOR PART NUMBER
C4, C5, C6, C7
*
1µF, 50V, X7R
C2
10µF, 10V, X7R or
tantalum (see note)
C3 33µF, 35V, X7R
C1 4.7µF, 6.3V, X7R
R8 1MΩ, 1%
R9 28.7kΩ, 1%
R4 115kΩ, 1%
R5 100kΩ, 1%
R7 100kΩ, 5%
R2 1MΩ, 5%
L1 10µH, 1.7A Sumida CDRH6D28-100
D1 60V, 2A Schottky Central Semi CMSH2-60M
LEDs 60 x 30mA LED Osram LW-Y2SG
LED driver MSL1060 MSL1060
PARAMETER VALUE
Minimum input voltage 4.75V
Maximum input voltage (set by
minimum LEDs string voltage)
30V
Number of LEDs 60
Number of LED strings 6
Number of LED per string 10
LED forward current (set by R5) 20mA
White LED
Osram LW-
Y3SG
Minimum LED forward voltage 2.9V
Typical LED forward voltage 3.3V
Maximum LED forward voltage 3.6V
Minimum LED string voltage 29V
Maximum LED string voltage 36V
Oscillator frequency (set by R4) 1.1MHz
Overvoltage protection (OVP)
trip point (set by R8 and R9)
45.9V
Table 4. Typ. Application Circuit Parameters Table 5. Typ. Application Circuit Bill of Materials
* Note: C7 is only required if tantalum capacitor is used for C2
4.7
Figure 16. Backlight Example Driving 60 White LEDs
Atmel LED Driver-MSL1060
6-string PWM LED Driver with Digitally Compensated, 1.1MHz,
48V Boost Regulator and ±1.5% LED String Current Balance