CAT37TDI-TE7 ON Semiconductor, CAT37TDI-TE7 Datasheet - Page 9

• Manufacturer Part Number: CAT37TDI-TE7
• Description: LED Drivers White LED Boost
• Manufacturer: ON Semiconductor

Specifications of CAT37TDI-TE7

• Number Of Segments: 4
• High Level Output Current: 40 mA
• Operating Supply Voltage: 2.5 V to 7 V
• Maximum Supply Current: 0.7 mA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TSOT-23-5
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3 V to 4.2 V
VIN
3 V to 4.2 V
VIN
3 V to 4.2 V
VIN
Figure 19. Three LEDs with DC Level Dimming Control
Figure 17. Two LEDs with DC Level Dimming Control
Figure 21. Four LEDs with PWM Dimming Control
1 mF
1 mF
1 mF
C1
C1
C1
4
4
4
5
VIN
SHDN
SHDN
5
VIN
SHDN
5
VIN
CAT37
6.8 mH
GND
CAT37
6.8 mH
6.8 mH
CAT37
L1
GND
GND
L1
2
L1
2
2
SW
SW
FB
SW
1
FB
FB
1
1
PWM
Dimming
3
Dimming
V
3
D1
3
D1
V
DC
0.1 mF
10 kW
180 kW
DC
D1
180 kW
10 kW
180 kW
10 kW
10 kW
TYPICAL APPLICATION CIRCUITS
6.34 W
R1
6.34 W
R1
6.34 W
R1
15 mA
15 mA
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15 mA
1 mF
1 mF
C2
1 mF
C2
C2
9
90
85
80
75
70
65
60
90
85
80
75
70
65
60
90
85
80
75
70
65
60
0
0
0
Figure 20. Efficiency − Three LEDs
Figure 22. Efficiency − Four LEDs
5
Figure 18. Efficiency − Two LEDs
5
5
LED CURRENT (mA)
LED CURRENT (mA)
LED CURRENT (mA)
10
10
10
VIN = 3.6 V
VIN = 3.0 V
VIN = 3.6 V
VIN = 3.0 V
15
15
15
VIN = 3.6 V
VIN = 3.0 V
20
20
20
25
25
25
30
30
30