CAT37TDI-GT3 ON Semiconductor, CAT37TDI-GT3 Datasheet - Page 9

• Manufacturer Part Number: CAT37TDI-GT3
• Description: IC BOOST CONV DC/DC TSOT23-5
• Manufacturer: ON Semiconductor
• Type: Backlight, White LEDr

Specifications of CAT37TDI-GT3

• Topology: PWM, Step-Up (Boost)
• Number Of Outputs: 1
• Internal Driver: Yes
• Type - Primary: Backlight
• Type - Secondary: White LED
• Frequency: 800kHz ~ 1.6MHz
• Voltage - Supply: 2.5 V ~ 7 V
• Mounting Type: Surface Mount
• Package / Case: TSOT-23-5, TSOT-5, TSOP-5
• Operating Temperature: -40°C ~ 85°C
• Current - Output / Channel: 40mA
• Internal Switch(s): Yes
• Efficiency: 80%
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -
• 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