 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
RT9272 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
|
|
|||||||||||||||||||||||||||||
RT9272 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
|
|
1 / 11 page  RT9272 Preliminary 1 DS9272-09 August 2007 www.richtek.com Pin Configurations High Performance, Constant Current LED Driver for Dual Panel Mobile Phone Ordering Information (TOP VIEW) VDFN-10L 3x3 General Description The RT9272 is a high efficiency step-up DC-DC converter specifically designed for dual panel mobile phone applications. According to SP status, RT9272 can either regulates output current flowing through series-connected LEDs for main panel or for sub panel with a common output LC filter. This along with compact VDFN-10L 3x3 package and high switching frequency allows less part count and smaller external components for space and cost saving. Pulling low EN pin shuts down the chip and reduces the supply current to less than 1 μA. The EN pin also accepts PWM signal for LED brightness dimming control. The averaged LED current is well proportional to the duty cycle of the PWM signal. The internal soft start reduces inrush current during EN turning on or PWM dimming control. Other features include OVP, OCP and OTP. OVP prevents the damages in case of feedback loop open. Features Low VIN Operating Range : 2.7V to 4.5V Maximum Output Voltage up to 16V Small LC filter by 1.1MHz Operation Frequency Share One Set of Inductor and Schottky Diode for 2 Channels Programmable Dimming Function by EN Pin with 100Hz to 1kHz 40 μμμμμA Quiescent Current (Switch-Off) Internal Soft-Start Function to Avoid PWM Dimming Noise. Zero Shut Down Supply Current Complete Protection : OVP, OCP, OTP and SS RoHS Compliant and 100% Lead (Pb)-Free Applications Dual panel mobile phone, with LED backlight Typical Application Circuit Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area, otherwise visit our website for detail. Figure 1. 2LEDs for Sub panel and 3LEDs for Main panel GND CH1 RT9272 OVP CH2 FB2 FB1 VCC LX EN SP Sub-Panel Main Panel V IN 1 2 3 4 5 6 7 8 9 10 1uF L 2.2uF Chip Enable C OUT DSH SS0520 C IN R1 R2 4.7uF Note : Richtek Pb-free and Green products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. 100% matte tin (Sn) plating. RT9272 Package Type QV : VDFN-10L 3x3 (V-Type) Operating Temperature Range P : Pb Free with Commercial Standard G : Green (Halogen Free with Commer- cial Standard) GND FB2 CH1 VCC LX SP OVP FB1 EN CH2 9 8 7 1 2 3 4 5 10 6 11 |
Similar Part No. - RT9272 |
|
Similar Description - RT9272 |
|
|
|
Link URL |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link to Datasheet | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
