Instruction/ maintenance manual of the product MC34676B Garmin
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© Freescale Semiconductor, In c., 2009. All rights reserved. Freescale Semiconductor User’s Guide Document Number: KT34676BUG Rev. 1.0, 2/2009 1P u r p o s e This User Guide helps the Lithium-Ion (Li-Io n) battery charger designer unde rstand the MC34676B an d its evaluation board.
Using the Dual 28V Input V oltage Charger with Linear Regulator , Rev . 1.0 2 Freescale Semiconductor Application Di agram 3 Application Diagram 3.1 Dual-Input St andalone Charger The MC34676B can be used as a dual-in put standalone Li-Ion charger . Fi gure 1 is the typical application circuit.
Using the Dual 28V Input V oltage Charger with Linear Regulator , Rev . 1.0 Freescale Semiconductor 3 Evaluation Bo ard Specificat ion 4 Evaluation Board S pecification The evaluation board is designed to work as a standalone cha rger , or as an embedded charger in a handheld system.
Using the Dual 28V Input V oltage Charger with Linear Regulator , Rev . 1.0 4 Freescale Semiconductor Component Sele ction 5 Component Selection 5.1 Input cap acitors C1 and C3 The input capacitor is used to minimize the input voltage transient that may cause instability .
Using the Dual 28V Input V oltage Charger with Linear Regulator , Rev . 1.0 Freescale Semiconductor 5 Component Selection 5.5 End-of-charge current set ting resistors R10 and R1 1 The end-of-charge (EOC) current for both t he AC charger and the USB charger can be se t by the resisto rs R10 and R1 1.
Using the Dual 28V Input V oltage Charger with Linear Regulator , Rev . 1.0 6 Freescale Semiconductor Layout Design 6 Layout Design 6.1 Layout The KIT34676EPEVBE PCB board has two copper layers. The component sid e of the KIT34676EPEVBE is provided to locate all components.
Using the Dual 28V Input V oltage Charger with Linear Regulator , Rev . 1.0 Freescale Semiconductor 7 Layout Design Figure 6. The Compone nt Side Layer of the Evaluation Board Figure 7.
Using the Dual 28V Input V oltage Charger with Linear Regulator , Rev . 1.0 8 Freescale Semiconductor Layout Design 6.2 Layout considerations • Place decoupling capacitors C1, C3 and C4 as close as possible to the AC pin, USB pin and BA T pin respective ly .
Using the Dual 28V Input V oltage Charger with Linear Regulator , Rev . 1.0 Freescale Semiconductor 9 Evaluation Bo ard Configuration 7 Evaluation Board Configuration 7.1 Pin Headers The J1 and J3 pin headers li nk the external power source to the AC pin or USB pin of the MC34676B respectively .
Using the Dual 28V Input V oltage Charger with Linear Regulator , Rev . 1.0 10 Freescale Semiconductor Evaluation Boar d Configuration 7.2 Connector Pads There are 14 connecting pads (TP1 to TP14 with correspo nding names) on the evaluation b oard to let the user simply connect the board to their system.
Using the Dual 28V Input V oltage Charger with Linear Regulator , Rev . 1.0 Freescale Semiconductor 11 Test Setup with th e Evalua tion Board 8 T est Setup with the Evaluation Board The test setup is shown in Figure 8 and Figure 9 . Con nect a DC power source with a larger than 2.
Using the Dual 28V Input V oltage Charger with Linear Regulator , Rev . 1.0 12 Freescale Semiconductor Bill of Material 9 Bill of Material Item Qty Part Reference Va l u e DESCRIPTION Footprint Mfr PN 1 2 C1,C3 1.
Using the Dual 28V Input V oltage Charger with Linear Regulator , Rev . 1.0 Freescale Semiconductor 13 References 10 References Following are URLs where you can ob tain information on other Freescale product s and application solutions: Product s Links Data Sheet MC34676 www .
How to Reach Us: Home Page: www .freescale.com E-mail: support@freescale.com USA/Europe or Locations No t Listed: Freescale Semiconductor T echnical Information Center , CH370 1300 N. Alma School Road Chandler , Arizona 85224 +1-800-521-6274 or +1-480-768-2130 support@freescale.
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