TB62757FUG Toshiba, TB62757FUG Datasheet - Page 14

• 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) (#): -

2. Application Circuit Example and Measurement Data (reference data)
2.8 to 5.5 V
* V
Note: These application examples are provided for reference only. Thorough evaluation and testing should be
than OVD detection level. (V
V
35
30
25
20
15
10
35
30
25
20
15
10
35
30
25
20
15
10
OUT
IN
2.8
2.8
2.8
=
implemented when designing your application’s mass production design.
voltage in driving 5 or 6 LEDs must be lower
3.1
3.1
3.1
Input Voltage - Efficiency/Output Current
Input Voltage - Efficiency/Output Current
Input Voltage - Efficiency/Output Current
3.4
3.4
3.4
3.7
3.7
3.7
2LED Drive, L=4.7μH
3LED Drive, L=6.8μH
4LED Drive, L=6.8μH
4
4
4
VIN(V)
VIN(V)
VIN(V)
SHDN
V
IN
GND
4.3
4.3
4.3
L
OUT
1
4.6
4.6
4.6
OVD
SW
FB
< 19 V)
4.9
4.9
4.9
S-Di
IOUT
I F
Efficiency
Efficiency
IOUT
I F
Efficiency
Efficiency
IOUT
I F
Efficiency
Efficiency
5.2
5.2
5.2
5.5
5.5
5.5
100
90
80
70
60
50
100
90
80
70
60
50
100
90
80
70
60
50
WLEDs
2 to 6
<Measurement Data>
Efficiency in the range of V
Output current in the range of V
14
35
30
25
20
15
10
35
30
25
20
15
10
2 LEDs
3 LEDs
4 LEDs
5 LEDs
6 LEDs
2 LEDs
3 LEDs
4 LEDs
5 LEDs
6 LEDs
2.8
2.8
3.1
3.1
•
Evaluation conditions (Ta = 25°C)
L
C
C
S-Di
WLEDs : NSCW215T (NICHIA Corp.)
1
1
2
Input Voltage - Efficiency/Output Current
Input Voltage - Efficiency/Output Current
3.4
3.4
Output Current (mA)
83.10 to 88.60
81.32 to 86.47
79.15 to 84.63
79.72 to 86.39
78.91 to 85.10
3.7
3.7
Efficiency (%)
: 1001AS series (TOKO, INC)
: C2012JB1E225K (TDK Corp.)
: C2012JB1E105K (TDK Corp.)
: CUS02 1 A/30 V (TOSHIBA Corp.)
V
5LED Drive, L=10μH
6LED Drive, L=10μH
(Size: 3.6 mm × 3.6 mm × 1.2 mm)
IN
21.17
20.85
20.56
20.10
19.95
= 3.6 V
IN
4
4
VIN(V)
VIN(V)
= 2.8 to 5.5 V
IN
4.3
4.3
= 3.0 to 5.0 V (V
4.6
4.6
4.9
4.9
Average Efficiency (%)
− 3.32
− 1.95
− 1.79
− 1.82
− 1.94
IOUT
I F
Efficiency
Efficiency
IOUT
Efficiency
I F
Efficiency
Min
TB62757FUG
Tolerance (%)
5.2
5.2
IN
2010-06-306
86.55
84.54
81.30
82.87
80.47
5.5
5.5
= 3.6 V typ.)
100
90
80
70
60
50
100
90
80
70
60
50
Max
1.73
1.38
1.15
1.22
1.26