RT9284A-20GJ6E Richtek USA Inc, RT9284A-20GJ6E Datasheet - Page 3

• 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: -

Pin Description
Function Block Diagram
DS9284A/B-06 June 2009
TSOT-23-5 TSOT-23-6
--
1
2
3
4
5
Pin No.
VDD
OVP
EN
1
2
3
4
5
6
Pin Name
LX
GND
FB
EN
OVP
VDD
Current Bias
BandGap
Protection Circuit
UVLO
Timer
OVP
5ms
Switch Pin. Connect this Pin to inductor and catch diode. Minimize the track
area to reduce EMI.
Ground Pin
Feedback Reference Voltage Pin. Series connect a resistor between WLED
and ground as a current sense. Sense the current feedback voltage to set
the current rating.
Chip Enable (Active High). Voltage sensing input to trigger the function of
over voltage protection. Note that this pin is high impedance. There should
be a pull low 100kΩ resistor connected to GND when the control signal is
floating.
Over Voltage Protection Pin. Voltage sensing input to trigger the function of
over voltage protection. Leave it unconnected to disable this function.
Supply Input Voltage Pin. Bypass 1uF capacitor to GND to reduce the input
noise.
ibias
V
REF
1.2MHz OSC
750mA
Soft Start
OCP
+
-
Pin Function
PWM
Logic
Buffer
+
-
V
REF
RT9284A/B
FB
GND
LX
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