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Atmel AVR365 User Manual
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Atmel AVR365 User Manual

Atmel AVR365 User Manual

Atbm302 hardware 8-bit microcontrollers
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Atmel AVR365: ATBM302 Hardware User Guide
Features
• Demonstration system for Atmel
• 5mΩ sense resistor current measurements with the 18-bit CC-ADC
• Use pre-programmed IC ATBM302
• Cable connector to cells, load and charger
• Communicate with BM300 via SMBus interface
• The components layout in the top layer and bottom layer
1 Introduction
The Atmel ATBM302-EK is the evaluation and development kit for the new Atmel
®
AVR
Battery Management device ATBM302. The ATBM302 is a battery
management and protection device for lithium-ion batteries. It can be used for 2S,
3S, and 4S application. The ATBM302-EK monitors cell voltage, charge and
discharge current and cell temperature to protect the battery pack. It also includes
gas gauge to calculate the battery's capacity.
Figure 1-1. ATBM302-EK kit.
®
ATBM302
8-bit Atmel
Microcontrollers
Application Note
Rev. 8336A-AVR-03/12

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Summary of Contents for Atmel AVR365

  • Page 1 • Communicate with BM300 via SMBus interface • The components layout in the top layer and bottom layer 1 Introduction The Atmel ATBM302-EK is the evaluation and development kit for the new Atmel ® Battery Management device ATBM302. The ATBM302 is a battery management and protection device for lithium-ion batteries.
  • Page 2 2 Hardware The Atmel ATBM302-EK can be divided in two parts: the main area and the connector area. The main area contains all the components needed in a battery pack. In the connector area there are four connectors: Cell connector, pack connector, ISP connector and SMBus connector.
  • Page 3 Atmel AVR365 Figure 2-2. The SCH of polarity circuit. 2.1.3 Pre-charge circuit The Atmel ATBM302 supports two pre-charge methods: Internal pre-charge and External pre-charge. If external pre-charge is selected, the external PCH pads in BM303 should be connected as shown in Figure 2-3, and the parameter ‘PrechargeCircuitSel’...
  • Page 4 2.2.1 Connectors The following connectors are available: • Cell connector(1-, 1+, 2+, 3+, 4+) • Pack connector to P+ and P- • ISP connector to download firmware to IC • SMBus communication connector to BM300 (SDA, SCL, GND) Atmel AVR365 8336A-AVR-03/12...
  • Page 5 Atmel AVR365 2.2.2 Pin description Table 2-1. Cell connector (TB1, TB2). Name Description Cell1 negative terminal Cell1 positive terminal, Cell2 negative terminal Cell2 positive terminal, Cell3 negative terminal Cell3 positive terminal, Cell4 negative terminal Cell4 positive terminal Table 2-2. ISP connector signals (J2).

  • Page 6: Connection Setup

    After power-up, the device will perform initialization in the first 30s. During this time, the reported current will not be correct. Run the Battery Studio 2.0. Please refer to the Atmel AVR363 Application Note to learn about how to use Battery Studio 2.

  • Page 7: Components Placement

    Atmel AVR365 4 Schematic and board layout 4.1 Schematic This section shows the schematic for the Atmel ATBM302-EK. Figure 4-1. ATBM302-EK schematic. 100nF 100nF Si2307 R50 150R Cut track beneath if mounted Charge & Discharge MOSFETs Q2 Si4168DY Q3 Si4168DY...

  • Page 8: Bill Of Materials (Bom)

    Figure 4-3. The bottom layer layout. 4.3 Bill of materials (BOM) This section shows the BOM for the Atmel ATBM302-EK. Table 4-1. BOM. Designator Description Quantity C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C14, C15, C16,...
  • Page 9 Atmel AVR365 R17, R18, R51 1MΩ thick film resistor, SMD 0603, 1/10W, 1% R22, R23 200kΩ thick film resistor, SMD 0603, 1/10W, 1% R24, R27, R28, R29, R30, R33, 10kΩ thick film resistor, SMD 0603, 1/10W, 1% 2.4kΩ thick film resistor, SMD 0603, 1/10W, 1% R37, R43 200Ω...

  • Page 10: Evaluation Board/Kit Important Notice

    (WEEE), FCC, CE or UL (except as may be otherwise noted on the board/kit). Atmel supplied this board/kit “AS IS,” without any warranties, with all faults, at the buyer’s and further users’ sole risk.
  • Page 11 Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN THE ATMEL...