View MAX1906EVKIT_307618.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-2483; Rev 0; 6/02
MAX1906 Evaluation Kit
General Description
The MAX1906 evaluation kit (EV kit) is a complete, fully assembled and tested circuit board that is used to evaluate the MAX1906 lithium-ion (Li+) battery-pack protector. The MAX1906 EV kit protects the battery pack by blowing an on-board fuse when any individual cell in the battery pack exceeds the overvoltage protection threshold. The MAX1906 EV kit is designed to evaluate the MAX1906X 4-cell Li+ battery-pack protector. The EV kit can also be used to evaluate the MAX1906S 2cell and the MAX1906V 3-cell Li+ battery-pack protectors. See the Selector Guide to request samples of the other ICs. Warning: The MAX1906 EV kit is designed to work with Li+ batteries under potentially dangerous conditions. Exercise extreme caution when performing overcharge tests on live Li+ cells. Users who power up this EV kit or power the sources connected to it must be careful to follow safety procedures appropriate to working with Li+ batteries. Under severe fault or failure conditions, this EV kit may dissipate large amounts of power, which could result in the mechanical ejection of a component or of component debris at high velocity. Operate this kit with care to avoid possible personal injury. o Overvoltage Protection o On-Board Fuse o Test Mode for Functional Verification o Evaluates 2-, 3-, and 4-Cell Battery Protectors o Fully Assembled and Tested
Features
Evaluates: MAX1906X/MAX1906V/MAX1906S
Ordering Information
PART MAX1906EVKIT TEMP RANGE 0C to +70C IC PACKAGE 16 QFN, 5mm x 5mm
Selector Guide
PART MAX1906XEGE* MAX1906VEGE MAX1906SEGE NO. OF CELLS / BATTERY PACK 4 3 2
*Installed on the EV kit.
Component List
DESIGNATION QTY DESCRIPTION 0.1F 10%, 16V ceramic capacitors (0603) Taiyo Yuden EMK107BJ104KA or TDK C1608X7R1E104KT 5A protection fuse Sony SFD-145B 2-pin headers 3-pin header 30V, 5.2A N-channel FET (6-pin SuperSOTTM) Fairchild FDC633N DESIGNATION QTY DESCRIPTION R1 1 10 5% resistor (0603) R2, R3, R4 R5 R6 R7 U1 None None None None 3 1 1 0 1 4 1 1 1 1k 5% resistors (0603) 560 5% resistor (2512) 100k 5% resistor (0603) Not installed, resistor (2512) MAX1906XEGE, 16-pin QFN Shunts (JU1, JU2, JU3, JU5) MAX1906 PC board MAX1906 data sheet MAX1906EVKIT data sheet
C1-C4
4
F1 JU1, JU2, JU3, JU6 JU5 N1
1 4 1 1
Component Suppliers
SUPPLIER Fairchild Sony Taiyo Yuden TDK PHONE 888-522-5372 81-3-3279-0448 800-348-2496 847-803-6100 FAX Local representative 81-3-5255-8448 847-925-0899 847-390-4405 WEBSITE www.fairchildsemi.com www.sccj.co.jp/html_e/ www.t-yuden.com www.component.tdk.com
Note: Please indicate that you are using the MAX1906 when contacting the manufacturers. SuperSOT is a trademark of Fairchild Semiconductor. ________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
MAX1906 Evaluation Kit Evaluates: MAX1906X/MAX1906V/MAX1906S
Quick Start
The MAX1906 EV kit is a fully assembled and tested surface-mount board. Follow the steps below to verify board operation. Do not turn on the battery charger until indicated: 1) Verify that shunts are not installed on jumpers JU1, JU2, and JU3 (fuse protection is disabled). 2) Verify that shunts are installed on jumper JU6 and across pins 1 and 2 of jumper JU5. 3) Connect the positive terminals of three voltmeters to the OUT, DRV, and DISCON pads. Connect the negative terminal of the voltmeters to the PACK- pad. 4) Connect the positive terminal of a 3.3V source to the VI/O pad. Connect the negative terminal of the source to the PACK- pad. 5) Measure the voltage across the 4-cell battery pack. 6) Connect the 4-cell (series connected) Li+ battery pack across BN and BATT4+. Observe the correct Li+ battery-pack polarity. a) Connect the negative terminal of the first cell to BN. b) Connect the positive terminal of the first cell to BATT1+. c) Connect the positive terminal of the second cell to BATT2+. d) Connect the positive terminal of the third cell to BATT3+. e) Connect the positive terminal of the fourth cell to BATT4+. For test purposes, the Li+ cells can be replaced by four floating power supplies 7) Verify that the voltage across OUT and PACK- is approximately the voltage measured in step 5. 8) Disable the battery charger. 9) Connect the positive terminal of the battery charger to PACK+. Connect the negative terminal of the battery charger to PACK-. 10) Enable the battery charger. 11) Force overcharge conditions and observe that OUT is pulled low and DRV is driven to approximately 5V. Note: In this configuration, fuse protection is disabled and the EV kit does not provide overvoltage protection. The current that would destroy the fuse in an overcharge condition is limited and sunk through resistor R5. Charging must be manually monitored. Enable fuse protection (one time) by removing the shunt across JU6 and installing it on JU3.
2 _______________________________________________________________________________________
Detailed Description
The MAX1906 EV kit is a complete, fully assembled and tested circuit board that is used to evaluate the MAX1906X Li+ battery-pack protector. The MAX1906X is designed to protect an Li+ battery pack, where 4 cells are connected in series. The EV kit protects against potentially hazardous conditions by disconnecting the battery pack from the battery charger. This is accomplished by blowing the protection fuse in the circuit when any individual cell in the pack exceeds the overvoltage protection threshold.
Inputs
The MAX1906 EV kit does not require an external power source for the EV kit to function. The EV kit uses the battery pack as the power source. Connect the Li+ battery pack across BATT4+ and BN pads and the battery charger across PACK+ and PACK- pads. The battery-pack terminals and all intermediate cell connection points must be connected to their corresponding input pads on the EV kit: 1) Connect the negative terminal of the first cell to BN. 2) Connect the positive terminal of the first cell to BATT1+. 3) Connect the positive terminal of the second cell to BATT2+. 4) Connect the positive terminal of the third cell to BATT3+. 5) Connect the positive terminal of the fourth cell to BATT4+.
One-Time Fuse
The MAX1906 EV kit disconnects the battery charger from the battery pack by blowing fuse F1 with high current when overcharging is detected. The fuse can only be used once and must be replaced if it is opened by overcharge detection. However, for repeated EV kit evaluation, the fuse can be bypassed by configuring JU3 and JU6 to redirect the high current through power resistor R5. Remove the shunt across JU3 and install the shunt across JU6 to avoid destroying the fuse. R5 limits the maximum current drawn in a fault condition to 31mA. Monitor all charging conditions of the battery pack when JU3 is open (fuse is disabled).
MAX1906 Evaluation Kit
Table 1. JU5 Settings
SHUNT POSITION 1 and 2 2 and 3 EV KIT FUNCTION Current sink through OUT pin Current sink through MOSFET N1
Output Signals
The MAX1906 EV kit drives outputs OUT, DRV, and DISCON high or low to warn the user if fault conditions are detected. Refer to the MAX1906 data sheet for the state of these outputs under different conditions.
Evaluates: MAX1906X/MAX1906V/MAX1906S
Current Sink
The MAX1906 EV kit sinks current during overcharge detection to blow the fuse. The EV kit sinks current in one of two ways: internally through the OUT pin, or externally through MOSFET N1 driven by the DRV pin. JU5 must be configured to choose the path for the current. See Table 1 for JU5 configuration. Note: During battery-overcharge detection, DRV is always driven high to drive the external MOSFET N1.
Evaluating MAX1906V/S
The MAX1906 EV kit is designed to evaluate the MAX1906X Li+ battery-pack protector. The EV kit can also be used to evaluate the MAX1906S 2-cell and the MAX1906V 3-cell Li+ battery-pack protectors. Order samples of these battery protectors and replace the MAX1906X (U1) on the board with the desired part. To evaluate other parts, configure JU1 and JU2 to account for the reduced number of cells in the Li+ battery pack. See Table 3 for JU1 and JU2 configurations.
Test Mode
The MAX1906 IC includes a special test mode that allows the chip to be tested in a fully assembled battery pack. Refer to the Test Mode section in the MAX1906 data sheet for test-mode setup instructions. Use the TEST pad to set the EV kit in test mode.
Table 2. JU1 and JU2
PART ON EV KIT MAX1906XEGE MAX1906VEGE MAX1906SEGE NO. OF CELLS / BATTERY PACK 4 3 2 SHUNT POSITION JU1 JU2 None None Installed None Installed Installed
_______________________________________________________________________________________
3
MAX1906 Evaluation Kit Evaluates: MAX1906X/MAX1906V/MAX1906S
F1 1 2
PACK+
BATT4+
JU6
3
R1 10 JU3
R5 560 JU4 OUT 1 16 B4P 14 13
C1 0.1F R2 1k
JU1 BATT3+
N.C.
B3P N.C.
C2 0.1F R3 1k
JU2 BATT2+
N1
32 JU5
1
7
OUT B2P N.C.
12 11 C3 0.1F
DRV
2
DRV
U1 MAX1906
TEST
3
TEST
B1P I.C.
10 9 C4 0.1F
R4 1k
BATT1+
DISCON
4 6 R6 100k
DISCON N.C. BN 8 15
VI/O
5
PKN
N.C.
PACKR7 SHORT (PC TRACE)
BN
Figure 1. MAX1906 EV Kit Schematic
4
_______________________________________________________________________________________
MAX1906 Evaluation Kit Evaluates: MAX1906X/MAX1906V/MAX1906S
Figure 2. MAX1906 EV Kit Component Placement Guide-- Component Side
Figure 3. MAX1906 EV Kit PC Board Layout--Component Side
Figure 4. MAX1906 EV Kit PC Board Layout--Solder Side
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 5 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

▲Up To Search▲

Price & Availability of MAX1906EVKIT

	To Download MAX1906EVKIT Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .