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