TB62757FUG Toshiba, TB62757FUG Datasheet - Page 10

• Manufacturer Part Number: TB62757FUG
• Manufacturer: Toshiba

Specifications of TB62757FUG

• Package: SOT23-6
• Supply Voltage: 2.8V to 5.5V
• # Leds Supported: 2 to 6 LEDs in series
• Sw Frequency: 1.1MHz
• Led Current Accuracy: ±5.23% (max)
• Protection Feature: Output overvoltage protection
• Other Features & Functions: -
• Rohs Compatible Product(s) (#): -

3) Input PWM signal with filtering to FB terminal
I
PWM 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]
F
can be adjusted with filtering PWM signal using RC filter indicated in recommended circuit, because the
•
<<Recommended circuit>>
LED current value goes over 100% of the current set with R
between 0 V to 325 mV (typ.).
for ref.) Voltage during PWM Signal-ON = 2 V
Supply Voltage [V]
No connect (OFF)
100%
10%
20%
30%
40%
50%
60%
70%
80%
90%
About external parts value, please see recommended circuit.
0
2.8 to 5.5 V
V
IN
=
Setting Current
Ratio with
116.1%
105.3%
95.1%
84.8%
74.6%
64.0%
53.8%
43.7%
34.0%
24.2%
13.3%
100%
SHDN
V
CC
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%
SENS
16 k Ω
Input PWM signal filtered with R,C to the FB terminal
20%
, if the input voltage after filtering is
TB62757FUG
TB62737FUG
40%
PWM Duty(%)
60%
TB62757FUG
2010-06-306
80%
100%