KIT34676EPEVBE Freescale Semiconductor, KIT34676EPEVBE Datasheet

KIT EVALUATION FOR MC34676

KIT34676EPEVBE

Manufacturer Part Number
KIT34676EPEVBE
Description
KIT EVALUATION FOR MC34676
Manufacturer
Freescale Semiconductor
Type
Battery Managementr
Datasheet

Specifications of KIT34676EPEVBE

Main Purpose
Power Management, Battery Charger
Embedded
No
Utilized Ic / Part
MC34676
Primary Attributes
1 Cell- Li-Ion
Secondary Attributes
Voltage input up to 28V
Interface Type
USB
Product
Power Management Modules
Silicon Manufacturer
Freescale
Silicon Core Number
MC34676
Kit Application Type
Power Management - Battery
Application Sub Type
Battery Charger
Kit Contents
Board, CD
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
MC34676
Freescale Semiconductor
User’s Guide
Using the High Input Voltage Charger for
Single Cell Li-Ion Batteries
(KIT34676EPEVBE)
1
2
© Freescale Semiconductor, Inc., 2009. All rights reserved.
Purpose
This User Guide helps the Lithium-Ion (Li-Ion) battery
charger designer understand the MC34676B and its
evaluation board. It illustrates the design procedure when
using the MC34676B to design a Li-Ion battery charger, and
the way to get the best performance from the MC34676B.
Scope
The 34676 is a dual 28V input voltage and fully-integrated
single cell Li-Ion battery charger, targeting smart handheld
applications. One of the inputs is optimized for charging with
a USB port, and the second is optimized for an AC/DC
adapter power source. The charger has two 28V power
devices, to eliminate the need of any external power source
selection and input over-voltage protection circuitry. Each of
the power devices independently controls the charge
current from the input, and performs as an independent
charger. Only one of the two chargers operate at a time.
The AC charger current and the USB charger current are
programmable, up to 1.2A and 400mA, with an external
resistor respectively. The voltage across the two external
resistors is also used to monitor the actual charge current
through each charger respectively. The EOC current of both
chargers is the same, and programmable by an external
resistor. The 4.85V regulator can be used to power a
sub-system directly.
The 34676 has a 5% constant current accuracy for the AC
Charger over -40 to 85
accuracy over -40 to 85
foldback feature, limits the charge current when the IC
internal temperature rises to a preset threshold.
o
o
C, and a 1.0% constant voltage
C. A charge current thermal
Contents
1
2 Scope
3 Application Diagram
4 Evaluation Board Specification
5 Component Selection
6 Layout Design
7 Evaluation Board Configuration
8 Test Setup with the Evaluation Board
9 Bill of Material. . . . . . . . . . . . . . . . . . . . . . . . 13
10 References
Purpose. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Document Number: KT34676BUG
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Rev. 1.0, 2/2009
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Related parts for KIT34676EPEVBE

KIT34676EPEVBE Summary of contents

Page 1

... Freescale Semiconductor User’s Guide Using the High Input Voltage Charger for Single Cell Li-Ion Batteries (KIT34676EPEVBE) 1 Purpose This User Guide helps the Lithium-Ion (Li-Ion) battery charger designer understand the MC34676B and its evaluation board. It illustrates the design procedure when using the MC34676B to design a Li-Ion battery charger, and the way to get the best performance from the MC34676B ...

Page 2

... ISET Figure 1. The dual-input Li-Ion Charger Figure 2 is the typical application circuit. MC34676B AC BAT BATDET USB USBOUT GND IMIN PPR CHG IUSB ISET USBEN R R IUSB ISET AC Figure 1 is the typical application circuit. Two VDDIO MCU USB Rev. 1.0 Freescale Semiconductor ...

Page 3

... BAT R 4 TP7 _1X2 00K 1 00K TP1 0 VLo gic 1 TP1 TP2 TP1 3 U SBE SBE N 1 Figure 3. The Schematic Circuit of the Evaluation Board Using the Dual 28V Input Voltage Charger with Linear Regulator, Freescale Semiconductor = 5.85V EEN 676 TP2 BAT / SBOU ...

Page 4

... A metal film with a 1% tolerance resistor should be used for USB Table 2 shows the charge current with the different settings of pin headers J10 and J11. J10 J11 Charge Current 150mA 450mA 750mA 1050mA Charge Current Rev. 1.0 Freescale Semiconductor Eqn. 1 Eqn. 2 ...

Page 5

... 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 evaluation board, two resistors with one pin header jumper are used for the user to conveniently configure different EOC current values. Using the Dual 28V Input Voltage Charger with Linear Regulator, Freescale Semiconductor Open Open Short ...

Page 6

... 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 Figure 4. The Overview of the Evaluation Board Figure 5. The Component Side Silkscreen Layer of the Evaluation Board Using the Dual 28V Input Voltage Charger with Linear Regulator overview of the board, followed by the layout of each layer ...

Page 7

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

Page 8

... To get better thermal performance, put the EPAD pin of the MC34676B on a large ground plane on the component side, and use a via array to connect the EPAD pin to the ground layer, or the large ground plane on the other layer. Using the Dual 28V Input Voltage Charger with Linear Regulator, 8 Rev. 1.0 Freescale Semiconductor ...

Page 9

... The J13 pin header allows the user to choose the AC charger when leaving it open, the USB charger is chosen when shorting pins 1 and 2. The default settings of the evaluation board are shown in Using the Dual 28V Input Voltage Charger with Linear Regulator, Freescale Semiconductor Table 4, which selects the AC charger of MC34676B. Table 4. The Default Settings of the Pin Headers ...

Page 10

... MC34676B. The VBAT pad connects the positive pole of the Li+ battery being charged. 7.3 Test Points The KIT34676EPEVBE evaluation board provides 11 signal test points and 3 ground test points for users to conveniently hook up multi-meters and oscilloscope probes to evaluate the MC34676B. The test points connect the pins of the MC34676B with the same names directly. ...

Page 11

... Figure 8. The AC Charger Set Up for the Evaluation Board USB Power Port Figure 9. The USB Charger Set Up for the Evaluation Board Using the Dual 28V Input Voltage Charger with Linear Regulator, Freescale Semiconductor and Figure 9. Connect a DC power source with a larger than 2.0A current limit ...

Page 12

... LITE ON LTST-C190KGKT TYCO ELEC- 826629-2 TRONICS TYCO ELEC- 826629-3 TRONICS KOA SPEER RK73H1JTTD2612F KOA SPEER RK73H1JTTD1302F KOA SPEER RK73H1JTTD6491F BOURNS CR0603JW471E BOURNS CR0603-JW-104ELF KOA SPEER RK73H1JTTD1332F KOA SPEER RK73H1JTTD2872F KOA SPEER RK73H1JTTD2003F N/A COMPONENTS TP-105-01-00 CORPORATION Freescale Rev. 1.0 Freescale Semiconductor ...

Page 13

... Following are URLs where you can obtain information on other Freescale products and application solutions: Products Data Sheet MC34676 Freescale’s Web Site Freescale’s Analog Web Site Freescale’s Power Management Using the Dual 28V Input Voltage Charger with Linear Regulator, Freescale Semiconductor Links www.freescale.com/files/analog/doc/data_sheet/MC34676.pdf www.freescale.com www.freescale.com/analog www.freescale.com/powermanagement References Rev. 1.0 ...

Page 14

... Freescale Semiconductor product could create a situation where personal injury or death may occur. Should Buyer ...

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