DV2002L2 TL2 LM317 bq2002 T

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DV2002L2/TL2
Control LM317 Linear Regulator Features
bq2002/T fast charge control evaluation development Charge current sourced from on-board linear regulator Fast charge NiCd NiMH cells (contact Benchmarq other number cells) Fast charge termination negative delta voltage (-V) peak voltage detect, maximum temperature maximum time -V/peak voltage detect, hold-off, top-off, maximum time, number cells jumper-configurable Inhibit fast charge logic-level input
General Description
DV2002L2/TL2 Development System provides development environment bq2002/T Fast Charge DV2002L2/TL2 incorporates bq2002/T linear regulator provide fast charge control NiCd NiMH cells. fast charge terminated following: peak voltage detect, maximum temperature, maximum time, inhibit command. Jumper settings select voltage termination mode, hold-off, top-off, maximum time limits. user provides power supply batteries. user configures DV2002L2/TL2 number cells, voltage, charge termination mode, maximum charge time (with without top-off). Please review bq2002/T data sheet before using DV2002L2/TL2 board. input from charger supply Select number cells Inhibit input Timer, etc. setting
Fixed Configuration
DV2002L2/TL2 board following fixed characteristics (4.75-5.25V) regulated on-board from supply connector (DC: GND). indicates charge status. Charge initiates later application battery which provides bq2002. shipped from Benchmarq, DV2002L2/TL2 linear regulator configured charging current 1.25A. This current level controlled value sense resistor RSNS relationship: ICHG 1.25V
Rev. Board
Connection Descriptions
BAT+ BAT-
Feb. 1995
Thermistor connection Positive battery terminal Battery ground Ground from charger supply
DV2002L2
value shipment This resistor changed depending application. suggested maximum ICHG DV2002L2/TL2 board 1.5A. must mounted appropriate heat sink. maximum cell voltage (MCV) scaled 2V/cell. With provided thermistor connected between BAT-, 50°C. (JP1): Selects fast charge safety time/hold-off/top-off (see bq2002 data sheet). Jumper Setting [12]3 1[23] State High Float
Table Lookup Table Selection
Input Voltage
Number Cells (JP3): resistor-divider network provided select cells (the resulting resistor value equals cells). 100K resistor, (RB20-RB25) jumper-selected. Closed Jumper Number Cells
Current 1.5A
Resistance 1.25 0.83
Wattage
thermistor identified serial number suffix follows: Identifier (blank) Thermistor Keystone RL0703-5744-103-S1 Philips 2322-640-63103 Fenwal Type 197-103LA6-A01 Ozhumi 150-108-00(4) Semetic 103AT-2
Temperature Disable: Connecting resistor between BAT- disables temperature control.
Setup Procedure
Configure INH, number-of-cells (NOC) jumpers. Connect provided thermistor resistor between BAT-. Attach battery pack BAT+ BAT-. temperature control, thermistor must contact cells. Attach current source connections JP4.
Jumper-Selectable Configuration
DV2002L2/TL2 must configured described below. (JP2): Enables/disables charge inhibit (see bq2002 data sheet). Jumper Setting [12]3 1[23] State Disabled (high) Enabled (low)
Rev. Board
Feb. 1995
DV2002L2 Recommended Operating Conditions
Symbol VBAT Description Maximum input current Maximum input voltage input voltage input voltage Minimum VBAT Typical Maximum VBAT Unit
Feb. 1995
Rev. Board
DV2002L2
DV2002L2/TL2 Board Schematic
Rev. Board
Feb. 1995
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DV2002L2 TL2 LM317 bq2002 T

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