RT9284B-20GJ6E Richtek USA Inc, RT9284B-20GJ6E Datasheet - Page 6

• Manufacturer Part Number: RT9284B-20GJ6E
• Description: IC LED DVR WHITE BCKLGT TSOT23-6
• Manufacturer: Richtek USA Inc

Specifications of RT9284B-20GJ6E

• Constant Current: Yes
• Internal Driver: Yes
• Type - Primary: Backlight, Flash/Torch
• Type - Secondary: White LED
• Mounting Type: Surface Mount
• Topology: PWM
• Number Of Outputs: 1
• Frequency: 900kHz ~ 1.5MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Package / Case: SOT-23-6 Thin, TSOT-23-6
• Operating Temperature: -40°C ~ 85°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Output: -

RT9284A/B
Typical Operating Characteristics
6
www.richtek.com
91%
90%
89%
88%
87%
86%
85%
83.5
82.5
81.5
80.5
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
91
90
89
88
87
86
85
84
83
82
81
3
3
3
I
LED
3.25 3.5 3.75
3.25 3.5 3.75
Enable Voltage vs. Input Voltage
= 20mA, L = 4.7μH, DCR = 0.15Ω
3.2
Maximum Duty Cycle vs. V
Efficiency vs. Input Voltage
-45°C
25°C
85°C
3.4
Input Voltage (V)
Input Voltage (V)
3WLEDs
4WLEDs
4
4
3.6
V
DD
4.25 4.5 4.75
4.25 4.5 4.75
(V)
3.8
4
5
5
DD
4.2
5.25 5.5
5.25 5.5
4.4
21.5
20.5
19.5
18.5
1.2
1.1
0.9
0.8
0.7
0.6
0.5
2.7
2.5
2.3
2.1
1.9
1.7
1.5
22
21
20
19
18
1
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
3
3
4WLEDs, L = 10μH
POR (Rising/Falling) vs. Temperature
Shut Down Voltage vs. Input Voltage
3.25 3.5 3.75
3.25 3.5 3.75
LED Current vs. Input Voltage
-45°C
25°C
85°C
Input Voltage (V)
Input Voltage (V)
Temperature (°C)
4
4
DS9284A/B-06 June 2009
Rising
Falling
4.25 4.5 4.75
4.25 4.5 4.75
5
5
5.25 5.5
5.25 5.5