Garmin MC34676B- Manuals

Page 2 - Using the Dual 28V Input Voltage Charger with Linear Regulator,; Freescale Semiconductor; Application Diagram; Dual-Input Standalone Charger; The MC34676B can be used as a dual-input standalone Li-Ion charger.; Figure 1; is the typical application circuit. Two; Embedded Charger; Figure 2; is the typical application circuit.; Figure 2. The Li-Ion Charger Embedded in the Hand Held System

Using the Dual 28V Input Voltage Charger with Linear Regulator, Rev. 1.0 2 Freescale Semiconductor Application Diagram 3 Application Diagram 3.1 Dual-Input Standalone Charger The MC34676B can be used as a dual-input standalone Li-Ion charger. Figure 1 is the typical application circuit. Two LEDs ind...

Page 3 - Evaluation Board Specification; Figure 3; Figure 3. The Schematic Circuit of the Evaluation Board

Using the Dual 28V Input Voltage Charger with Linear Regulator, Rev. 1.0 Freescale Semiconductor 3 Evaluation Board Specification 4 Evaluation Board Specification The evaluation board is designed to work as a standalone charger, or as an embedded charger in a handheld system. Figure 3 shows its sche...

Page 4 - Component Selection; Input capacitors C1 and C3; Table 1; USB CC-mode charge current setting resistors R8 and R9; Table 2; Table 1. The AC CC-mode Charge Current Settings; Table 2. The USB CC-mode Charge Current Settings; Charge Current

Using the Dual 28V Input Voltage Charger with Linear Regulator, Rev. 1.0 4 Freescale Semiconductor Component Selection 5 Component Selection 5.1 Input capacitors C1 and C3 The input capacitor is used to minimize the input voltage transient that may cause instability. A ceramic capacitor of 1.0 μ F o...

Page 5 - End-of-charge current setting resistors R10 and R11; Table 3; Table 3. The EOC Current Settings

Using the Dual 28V Input Voltage Charger with Linear Regulator, Rev. 1.0 Freescale Semiconductor 5 Component Selection 5.5 End-of-charge current setting resistors R10 and R11 The end-of-charge (EOC) current for both the AC charger and the USB charger can be set by the resistors R10 and R11. On the e...

Page 6 - Layout Design; Layout; Figure 4; is an overview of the board, followed by the layout of each layer.; Figure 4. The Overview of the Evaluation Board

Using the Dual 28V Input Voltage 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 side of the KIT34676EPEVBE is provided to locate all components. Figure 4 is an overview of th...

Page 7 - Figure 6. The Component Side Layer of the Evaluation Board

Using the Dual 28V Input Voltage Charger with Linear Regulator, Rev. 1.0 Freescale Semiconductor 7 Layout Design Figure 6. The Component Side Layer of the Evaluation Board Figure 7. The Solder Side Layer of the Evaluation Board

Page 8 - Layout considerations; capacitance between the current setting pin and ground.

Using the Dual 28V Input Voltage 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 BAT pin respectively.• Place the charge current setting resistor as c...

Page 9 - Evaluation Board Configuration; Pin Headers; The default settings of the evaluation board are shown in; Table 4; , which selects the AC charger of MC34676B.; Table 4. The Default Settings of the Pin Headers; Pin Header Jumpers

Using the Dual 28V Input Voltage Charger with Linear Regulator, Rev. 1.0 Freescale Semiconductor 9 Evaluation Board Configuration 7 Evaluation Board Configuration 7.1 Pin Headers The J1 and J3 pin headers link the external power source to the AC pin or USB pin of the MC34676B respectively. It allows...

Page 10 - Connector Pads; Open

Using the Dual 28V Input Voltage Charger with Linear Regulator, Rev. 1.0 10 Freescale Semiconductor Evaluation Board Configuration 7.2 Connector Pads There are 14 connecting pads (TP1 to TP14 with corresponding names) on the evaluation board to let the user simply connect the board to their system. ...

Page 11 - Test Setup with the Evaluation Board; The test setup is shown in; Figure 8; and; Figure 9; . Connect a DC power source with a larger than 2.0A current limit to; Figure 8. The AC Charger Set Up for the Evaluation Board

Using the Dual 28V Input Voltage Charger with Linear Regulator, Rev. 1.0 Freescale Semiconductor 11 Test Setup with the Evaluation Board 8 Test Setup with the Evaluation Board The test setup is shown in Figure 8 and Figure 9 . Connect a DC power source with a larger than 2.0A current limit to the AC...

Page 12 - Bill of Material

Using the Dual 28V Input Voltage Charger with Linear Regulator, Rev. 1.0 12 Freescale Semiconductor Bill of Material 9 Bill of Material Item Qty Part Reference Value DESCRIPTION Footprint Mfr PN 1 2 C1,C3 1.0UF CAP CER 1.0UF 16V 10% X5R 0603 CC0603 MURATATDK GRM188R61C105KA93C1608X5R1C105K 2 1 C2 NC...

Page 13 - References; Products; Freescale’s Web Site

Using the Dual 28V Input Voltage Charger with Linear Regulator, Rev. 1.0 Freescale Semiconductor 13 References 10 References Following are URLs where you can obtain information on other Freescale products and application solutions: Products Links Data Sheet MC34676 www.freescale.com/files/analog/doc...