TB62757FUG Toshiba, TB62757FUG Datasheet - Page 11

• 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) (#): -

4) Input logic signal
OFF
OFF
ON
ON
M1
I
The Resistor connected the ON-State N-ch MOS Drain and R
Average of Setting Current Io (mA) is next, approximately.
F
can be adjusted with Logic signal input as indicated in recommended circuit.
<<Recommended circuit>>
I
F
OFF
OFF
= (325 [mV]/Sum of Resistor Value [Ω])
ON
ON
M2
2.8 to 5.5 V
V
IN
=
325
[
mV
]
×
R
SHDN
SENS
V
CC
GND
6.8 μH
[
Ω
325
11
325
]
×
OVD
SW
[
R
[
mV
FB
mV
[ 1
R
Ω
S-Di
M1
SENS
]
]
LED Current
Logic signal
×
]
R
×
325
+
R SENS
R SENS
SENS
R SENS
R SENS
R
SENS
[
SENS
Ω
[mV]
]
[
×
R1
Ω
R
[
[
]
Ω
[
[
Ω
[
Ω
Ω
[ 1
determines I
Ω
]
]
]
]
]
Ω
+
×
×
+
×
R2
M2
R
]
R
R
R
R
×
[ 1
[ 1
2
[ 2
[ 2
R
Ω
Ω
[
2
Ω
Ω
Ω
]
]
[
]
]
]
Ω
+
]
R
[ 1
F
.
Ω
]
×
R
2
[
TB62757FUG
Ω
]
2010-06-306