TB62757FUG Toshiba, TB62757FUG Datasheet - Page 17

• 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) (#): -

5. Application Circuit Example and Measurement Data (reference data)
2.8 to 5.5 V
Note: These application examples are provided for reference only. Thorough evaluation and testing should be
V
IN
35
30
25
20
15
10
35
30
25
20
15
10
2.8
2.8
=
implemented when designing your application’s mass production design.
3.1
3.1
3.4
3.4
Input Voltage - Efficiency/Output Current
Input Voltage - Efficiency/Output Current
3.7
3.7
2LED Drive, L=5.1μH
4LED Drive, L=5.1μH
4
4
VIN(V)
VIN(V)
SHDN
V
IN
GND
4.3
4.3
L
1
4.6
4.6
OVD
SW
FB
I F
Efficiency
Iout
Efficiency
4.9
4.9
I F
Iout
Efficiency
Efficiency
S-Di
5.2
5.2
5.5
5.5
100
90
80
70
60
50
100
90
80
70
60
50
WLEDs
2 to 4
<Measurement Data>
Efficiency in the range of V
Output current in the range of V
17
2 LEDs
3 LEDs
4 LEDs
2 LEDs
3 LEDs
4 LEDs
35
30
25
20
15
10
2.8
•
3.1
Evaluation conditions (Ta = 25°C)
L
C
C
S-Di
WLEDs : NSCW215T (NICHIA Corp.)
1
1
2
3.4
Input Voltage - Efficiency/Output Current
Output Current (mA)
83.08 to 89.23
79.02 to 86.30
75.75 to 83.83
Efficiency (%)
3.7
: 32R51 (KOA Corp.)
: C2012JB1E225K (TDK Corp.)
: C2012JB1E105K (TDK Corp.)
: CUS02 1 A/30 V (TOSHIBA Corp.)
V
(Size: 3.2 mm × 2.5 mm × 0.6 mm)
IN
3LED Drive, L=5.1μH
21.06
20.57
20.22
= 3.6 V
IN
4
VIN(V)
= 2.8 to 5.5 V
IN
4.3
= 3.0 to 5.0 V (V
4.6
I F
Efficiency
Iout
Efficiency
4.9
Average Efficiency (%)
− 2.46
− 2.39
− 2.28
Min
TB62757FUG
Tolerance (%)
5.2
IN
2010-06-306
86.73
83.52
80.78
5.5
= 3.6 V typ.)
100
90
80
70
60
50
Max
4.02
2.94
2.65