RT9284A-20GJ6E Richtek USA Inc, RT9284A-20GJ6E Datasheet - Page 7

• Manufacturer Part Number: RT9284A-20GJ6E
• Description: IC LED DVR WHITE BCKLGT TSOT23-6
• Manufacturer: Richtek USA Inc

Specifications of RT9284A-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: -

DS9284A/B-06 June 2009
252.2
251.8
251.6
251.4
251.2
250.8
250.6
I
LED
EN
252
251
I
1.8
1.6
1.4
1.2
0.8
0.6
0.4
0.2
IN
2
1
0
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
3
4WLEDs, V
(5V/Div)
(100mA/Div)
(10mA/Div)
Feedback Voltage vs. Temperature
Switching Current vs. Input Voltage
3.25 3.5 3.75
IN
Dimming Operation
= 3.7V, I
Temperature (°C)
Time (400μs/Div)
Input Voltage (V)
4
LED
4.25 4.5 4.75
= 20mA, L = 10μH
f = 1kHz, Duty = 50%
-45°C
5
25°C
85°C
5.25 5.5
I
I
EN
LED
EN
LED
1.45
1.35
1.25
1.15
1.05
I
I
IN
1.5
1.4
1.3
1.2
1.1
IN
1
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
4WLEDs, V
Switching Frequency vs. Temperature
4WLEDs, V
(5V/Div)
(100mA/Div)
(10mA/Div)
(5V/Div)
(50mA/Div)
(10mA/Div)
IN
IN
Dimming Operation
Dimming Operation
= 3.7V, I
= 3.7V, I
Temperature (°C)
Time (40μs/Div)
Time (2ms/Div)
LED
LED
RT9284A/B
= 20mA, L = 10μH
= 20mA, L = 10μH
f = 10kHz, Duty = 50%
f = 100Hz, Duty = 50%
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