BD6583MUV-A
Technical Note
●Attention point of board layout
In board pattern design, the wiring of power supply line should be low Impedance, and put the bypass capacitor if necessary.
Especially the wiring impedance must be lower around the DC/DC converter.
●About heat loss
In heat design, operate the DC/DC converter in the following condition.
(The following temperature is a guarantee temperature, so consider the margin.)
1. Periphery temperature Ta must be less than 85 ℃.
2. The loss of IC must be less than dissipation Pd.
●Application example
LED current setting controlled ISETH resistor.
24kΩ : 20mA
30kΩ : 16mA
19.6kΩ : 24.5mA
33kΩ : 14.5mA
Brightness control
Please input PWM pulse from PWMPOW or PWMDRV terminal.
Please refer electrical characteristic p.3 and function (p.12).
15inch panel
Battery
10μF
4.7μH
2.2μF *
10LED x 6 parallel
RTR020N05
47mΩ
Power
ON/OFF
100Hz~10kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24kΩ
Each 20mA
Can be set up to each 10 ~25mA
Fig.46 10 series×6 parallel, LED current 20mA setting
Current driver PWM application
13~14inch panel
Battery
10μF
4.7μH
2.2μF *
8LED x 6 parallel
RTR020N05
51mΩ
Power
ON/OFF
100Hz~1kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24kΩ
Each 20mA
Can be set up to each 10~25mA
Fig.47 8 series× parallel, LED current 20mA setting
Power control PWM application
Battery
10μF
4.7μH
2.2μF *
8LED x 6 parallel
RTR020N05
51mΩ
Power
ON/OFF
100Hz~10kHz
PWM
1μF
SW
SENSP
SENSN
FAILSEL
VDET
RSTB
PWMPOW
LED1
PWMDRV
VBAT
LED2
LED3
LED4
VREG
LED5
GND GND GND GND TEST ISETH ISETL LED6
24kΩ
Each 20mA
Can be set up to each 10~25mA
Fig.48 8 series×6 parallel, LED current 20mA setting
Current driver PWM application
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2011.06 - Rev.C