TB62755FPG Toshiba, TB62755FPG Datasheet - Page 7

• Manufacturer Part Number: TB62755FPG
• Manufacturer: Toshiba

Specifications of TB62755FPG

• Package: SON6
• Supply Voltage: 2.8V to 5.5V
• # Leds Supported: 2 to 8 LEDs in series
• Sw Frequency: 1.0MHz
• Led Current Accuracy: ±5.0% (max)
• Protection Feature: Output overvoltage protection
• Other Features & Functions: -
• Rohs Compatible Product(s) (#): Available

(4)
Input logic signal
I
The resistor connected the ON-State Nch MOSFET drain and RSENS determines IF.
Average of setting current I
<<Recommended application>>
F
OFF
OFF
can be adjusted with logic signal input as indicated in recommended circuit.
ON
ON
M1
I
F
[mA]
OFF
OFF
=
ON
ON
M2
2.8 to 5.5 V
Sum
VIN =
of
resistor
300
[mV]
F
300
(mA) is next, approximately.
value
[mV]
[
Ω
×
]
RSENS
VIN
SHDN
22 μ H
GND
300
300
[
Ω
OVD
]
SW
[mV]
[mV]
7
×
FB
R1[
RSENS
S-Di
LED Current
Ω
×
×
M1
RSENS
Logic signal
300
]
RSENS[
RSENS[
RSENS
RSENS
+
R1
RSENS[
[mV]
[
Ω
[
]
Ω
×
[
[
Ω
Ω
Ω
Ω
]
R1[
]
]
]
]
Ω
+
+
×
×
M2
Ω
R2
]
R1[
R1[
R2[
R2[
×
]
R2[
×
Ω
Ω
Ω
Ω
R2[
]
]
]
]
Ω
Ω
]
+
]
R1[
Ω
]
×
R2[
Ω
]
TB62755FPG
2011-05-25