TB62737FUG(O,EL) Toshiba, TB62737FUG(O,EL) Datasheet - Page 10

• Manufacturer Part Number: TB62737FUG(O,EL)
• Description: IC LED DRIVR WHITE BCKLGT 6-SSOP
• Manufacturer: Toshiba
• Type: Backlight, White LEDr

Specifications of TB62737FUG(O,EL)

• Constant Current: Yes
• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 770kHz ~ 1.43MHz
• Voltage - Supply: 2.8 V ~ 5.5 V
• Mounting Type: Surface Mount
• Package / Case: SC-74-6
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 20mA
• Internal Switch(s): Yes
• Efficiency: 87%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• Other names: TB62737FUGTR

4) Input PWM signal with filtering to FB terminal
I
signal can be regard as analog voltage after filtering.
This method is without repeating IC ON/OFF, and no need to consider holding rash current.
[Notice]
<Recommended application>
F
can be adjusted with filtering PWM signal using RC filter indicated in recommended circuit, because the PWM
•
LED current value goes over 100% of the current set with RSENS, if the input voltage after filtering is
between 0 V to 325 mV (typ.).
(Reference data) Voltage during PWM Signal-ON = 2 V
No connect (OFF)
Supply Voltage
100%
10%
20%
30%
40%
50%
60%
70%
80%
90%
(V)
0
2.8 to 5.5 V
V
IN
About external parts value, please see recommended circuit.
=
Ratio with Setting
105.3%
Current
116.1%
95.1%
84.8%
74.6%
64.0%
53.8%
43.7%
34.0%
24.2%
13.3%
100%
SHDN
V
IN
GND
6.8 µ H
10
OVD
SW
PWM signal
FB
S-Di
140.0%
120.0%
100.0%
80.0%
60.0%
40.0%
20.0%
0.0%
0%
16 k Ω
Input PWM signal filtered with R,C to the FB terminal
Input PWM signal filtered with RC to the FB terminal
20%
TB62737FUG
TB62737FUG
40%
PWM Duty(%)
60%
TB62737FUG
2006-06-14
80%
100%