RT9284AGJ5E Richtek USA Inc, RT9284AGJ5E Datasheet
RT9284AGJ5E
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RT9284AGJ5E Summary of contents
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Tiny Package, High Performance, Constant Current Switching Regulator for White LED General Description The RT9284A compact, high efficient and high integration LED driver. Internal 22V MOSFET can support White LEDs for backlighting and camera flashing. ...
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RT9284A/B Typical Application Circuit V IN 2.7V to 5.5V Dimming Control V IN 2.7V to 5.5V Dimming Control + V IN 2.7V to 5.5V Dimming Control + V IN 2.7V to 5.5V www.richtek.com 2 L1 4.7uH to 22uH + C1 ...
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Pin Description Pin No. Pin Name TSOT-23-5 TSOT-23 GND OVP 5 6 VDD Function Block Diagram VDD OVP EN DS9284A/B-06 June 2009 Switch Pin. Connect this Pin ...
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RT9284A/B Absolute Maximum Ratings Supply Input Voltage ------------------------------------------------------------------------------------------------------ −0. Input Voltage ----------------------------------------------------------------------------------------------------------- −0.3V to 22V OVP Voltage ---------------------------------------------------------------------------------------------------------------- −0.3V to 22V The Other Pins ------------------------------------------------------------------------------------------------------------- −0. Power Dissipation 25° ...
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Parameter MOSFET On Resistance of MOSFET Protection OVP Threshold OVP Sink Current OCP Shut Down Voltage Enable Voltage Note 1. Stresses listed as the above “Absolute Maximum Ratings” may cause permanent damage to the device. These are for stress ratings. ...
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RT9284A/B Typical Operating Characteristics Enable Voltage vs. Input Voltage 1.2 1.1 -45°C 1.0 25°C 0.9 85°C 0.8 0.7 0.6 0.5 3 3.25 3.5 3.75 4 Input Voltage (V) Efficiency vs. Input Voltage 20mA 4.7μH, DCR ...
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Switching Current vs. Input Voltage 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0 3.25 3.5 3.75 4 Input Voltage (V) Feedback Voltage vs. Temperature 252.2 252 251.8 251.6 251.4 251.2 251 250.8 250.6 -40 -30 -20 ...
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RT9284A/B Dimming Operation 4WLEDs 3.7V LED EN (5V/Div (100mA/Div) (10mA/Div) I LED Time (4μs/Div) Inrush Current 4WLEDs 3.0V LED (2V/Div) EN (2V/Div (5V/Div) V OUT I IN (100mA/Div) ...
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Normal Operation (5V/Div) (2V/Div) V OUT (10V/Div (100mA/Div) Time (400ns/Div) DS9284A/B-06 June 2009 4WLEDs 4. 20mA 10μH LED V OUT V RT9284A/B Normal Operation (5V/Div) (2V/Div) 4WLEDs, V ...
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RT9284A/B Application Information Power Sequence The RT9284A/B must take notice of the power sequence. The power sequence of RT9284A/B has to VDD early than EN or else the RT9284A/B maybe fall into the unknown state to result in RT9284A/B turn ...
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L1 4.7uH to 22uH 2.7V to 5.5V RT9284A 6 1 VDD LX V > 1. OVP V < 0. GND FB 2.8V 0V Figure 7. Filtered PWM Signal for LED ...
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RT9284A/B Figure 10. Bottom Layer www.richtek.com 12 DS9284A/B-06 June 2009 ...
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Outline Dimension Symbol DS9284A/B-06 June 2009 Dimensions In Millimeters Min Max 0.700 1.000 0.000 0.100 1.397 1.803 0.300 0.559 2.591 3.000 2.692 3.099 0.838 ...
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RT9284A/B Symbol Richtek Technology Corporation Headquarter 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Fax: (8863)5526611 Information that is provided by Richtek Technology Corporation is believed to ...