CAT37TDI-GT3 CATALYST SEMICONDUCTOR, CAT37TDI-GT3 Datasheet - Page 4

• Manufacturer Part Number: CAT37TDI-GT3
• Description: LED DR, BOOST, 4 LED, SER
• Manufacturer: CATALYST SEMICONDUCTOR

Specifications of CAT37TDI-GT3

• Led Driver Application: Color LCD And Keypad Backlighting, Digital Cameras
• Topology: Boost
• No. Of Outputs: 1
• Input Voltage: 2.5V To 7V
• Dimming Control Type: PWM
• Operating Temperature Range: -40°C To +85°C

105
100
110
1.3
1.2
1.1
1.0
0.9
0.8
30
20
10
95
90
85
80
0
1
2
0
3 LEDs
Figure 4. FB Pin Voltage vs. LED Current
Figure 6. Switching Frequency vs. Input
Figure 2. LED Current vs. Input Voltage
4 LEDs
2
(V
3
5
IN
LED CURRENT (mA)
INPUT VOLTAGE (V)
INPUT VOLTAGE (V)
= 3.6 V, T
3
Voltage
10
AMB
4
= 25°C, C
3 LEDs
10 mA
20 mA
4
TYPICAL CHARACTERISTICS
IN
15
5
= 4.7 mF, C
5
http://onsemi.com
OUT
20
6
6
4
= 1 mF, L = 6.8 mH, unless otherwise specified.)
16.0
15.5
15.0
14.5
14.0
100
1.3
1.2
1.1
1.0
0.9
0.8
95
90
85
80
−50
−50
−50
4 LEDs at 15 mA
VIN = 3.6 V
Figure 5. FB Pin Voltage vs. Temperature
Figure 3. LED Current vs. Temperature
LOAD = 3 LEDs
VIN = 3.6 V
−25
−25
−25
Figure 7. Switching Frequency vs.
TEMPERATURE (°C)
TEMPERATURE (°C)
TEMPERATURE (°C)
0
0
0
LOAD = 20 mA
Temperature
4 LEDs
25
25
25
50
50
50
75
75
75
100
100
100