FAN5608HMPX Fairchild Semiconductor, FAN5608HMPX Datasheet - Page 7

• Manufacturer Part Number: FAN5608HMPX
• Description: IC LED DRIVR WHITE BCKLGT 12-MLP
• Manufacturer: Fairchild Semiconductor
• Type: Backlight, White LED (Serial Interface)r

Specifications of FAN5608HMPX

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 2
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 500kHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Voltage - Output: 24V
• Mounting Type: Surface Mount
• Package / Case: 12-MLP
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 20mA
• Internal Switch(s): Yes
• Efficiency: 85%
• Number Of Segments: 12
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Supply Current: 0.1 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: FAN5608HMPXTR; FAN5608HMPX_NL; FAN5608HMPX_NLTR; FAN5608HMPX_NLTR

Preliminary Data Sheet
REV. 0.8.3 5/29/03
PWM Control
2. A is High and B is PWM. I
3. A and B are PWM. I
Notes:
4. Maximum PWM frequency can be up to 30KHz.
5. Proportionally select the duty cycle to achieve a typical LED current between 1mA and 19mA.
A Input (PWM)
B Input (PWM)
LED CURRENT
A Input
B Input (PWM)
I LED
(Continued)
0mA
LED
0mA
(Average) =
LED
Duty Cycle
Duty Cycle
Duty Cycle
I
LED
1KHz
30%
1KHz
1KHz
30%
30%
(Average) = 5mA + x 15mA, where
(Average) = 0.3 x 20mA + 0.7 x 5mA = 9.5mA
I
LED
(Average) = 0.3 x 20mA = 6mA
x 20mA, where
is Duty Cycle.(Note 4)
is Duty Cycle.(Note 4, 5)
I
LED
Duty Cycle
1KHz
70%
(Average) = 0.7 x 20mA + 0.3 x 5mA = 15.5mA
I
LED
Duty Cycle
Duty Cycle
1KHz
1KHz
70%
70%
(Average) = 0.7 x 20mA = 14mA
OFF
OFF
FAN5608
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