RT9527 RICHTEK [Richtek Technology Corporation], RT9527 Datasheet
RT9527
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RT9527 Summary of contents
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... Single Cell Li-Ion Battery Charger with Adjustable Charging Current for Portable Applications General Description The RT9527 is a low cost single-cell Li-ion charger for low current charge applications. The RT9527 can be powered up from an AC adapter or USB (Universal Serial Bus) port inputs. The RT9527 enters sleep mode when VIN power is removed ...
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... RT9527 Ordering Information RT9527 Package Type QW : WDFN-8L 2x2 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek 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. Functional Pin Description Pin No ...
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... Operation The RT9527 is a Li-ion charger that can support the input voltage range from 4.4V to 6V. It provides a wide fast- charge current setting ranging from 10mA up to 600mA. Change Current Setting The charging current is adjustable via an external resistor between the ISET and GND pin. ...
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... RT9527 Absolute Maximum Ratings Supply Input Voltage, VIN ----------------------------------------------------------------------------------------------- −0.3V to 28V CHG, PGOOD -------------------------------------------------------------------------------------------------------------- −0.3V to 28V Other Pins ------------------------------------------------------------------------------------------------------------------- −0. Power Dissipation 25° WDFN-8L 2x2 -------------------------------------------------------------------------------------------------------------- 0.833W Package Thermal Resistance (Note 2) WDFN-8L 2x2, θ --------------------------------------------------------------------------------------------------------- 120°C/W JA WDFN-8L 2x2, θ --------------------------------------------------------------------------------------------------------- 8.2°C/W JC Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C Junction Temperature ----------------------------------------------------------------------------------------------------- 150° ...
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... TERMI 125 6.2 6.5 -- 0.2 375 500 1440 1800 FCHG 11520 14400 17280 -- 200 -- 200 -- 100 -- RT9527 Max Unit 90 AΩ 2 ° Ω 625 2160 μ ...
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... RT9527 Note 1. Stresses beyond those listed “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions may affect device reliability. Note 2. θ ...
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... Richtek Technology Corporation. All rights reserved. DS9527-00 May 2012 RT9527 1 8 VIN BAT PGOOD CHG 6 TIMER ISET GND 9 (Exposed Pad registered trademark of Richtek Technology Corporation. RT9527 C OUT NTC TIMER ISET www.richtek.com 7 ...
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... RT9527 Typical Operating Characteristics Charge On/Off Control from VIN V IN (5V/Div) V CHG (5V/Div) V BAT (2V/Div) I BAT (500mA/Div 5V BAT Time (500ms/Div) V Hot-Plug with NTC/Without Battery (5V/Div) V PGOOD (5V/Div) V BAT (5V/Div (5V/Div) Time (100ms/Div) V Hot-Plug with NTC/Battery (5V/Div) ...
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... 4.100 Temperature (°C) Fast-Charge Current vs. Battery Voltage 800 750 700 650 600 550 500 450 1kΩ IN ISET 400 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 Battery Voltage ( registered trademark of Richtek Technology Corporation. RT9527 75 100 125 4.1 www.richtek.com 9 ...
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... CHG transits from low to high. CHG will be unless the power is re-toggled. ISET Pin Short Protection After VIN power plugs in, RT9527 will detect that ISET pin is short to ground or not. If RISET is smaller than R RT9527 regard that ISET pin is short to ground. Then, RT9527 will disable charge function until VIN power reset. ...
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... Sleep mode The RT9527 enters sleep mode if both the AC and USB ports are removed from the input. This feature prevents draining the battery during the absence of an input supply. Battery Pack Temperature Monitoring The RT9527 features an external battery pack temperature monitoring input ...
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... Layout Considerations Four-Layer PCB The RT9527 is a fully integrated low cost single cell Li-Ion battery charger ideal for portable applications. Careful PCB layout is necessary. For best performance, place all peripheral components as close to the IC as possible. A short connection is highly recommended. The following guidelines must be strictly followed when designing a PCB layout for the RT9527 ...
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... Operation State Diagram for Charger Function (RT9527) Standby State PFET = OFF YES V > V > V OVP IN UVLO Time Counter NO YES Power Off State PFET = OFF – Any State V > OVP Sleep State Or V < V PFET = OFF IN UVLO NO V BAT CHG = H (latch) ...
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... RT9527 Outline Dimension Symbol Richtek Technology Corporation 5F, No. 20, Taiyuen Street, Chupei City Hsinchu, Taiwan, R.O.C. Tel: (8863)5526789 Richtek products are sold by description only. Richtek reserves the right to change the circuitry and/or specifications without notice at any time. Customers should obtain the latest relevant information and data sheets before placing orders and should verify that such information is current and complete ...