DV2004ES3 bq2004E 1N749 1N755 1N758 1N964A 1N966A 1N967A 1N968A 197-103LA6-A01 - Datasheet Archive

 

Nickel/Li-Ion Development System Control of On-Board p-FET Switch-Mode Regulator Features ® bq2004E fast charge control

 

DV2004ES3 DV2004ES3 Nickel/Li-Ion Development System Control of On-Board p-FET Switch-Mode Regulator Features ® bq2004E bq2004E fast charge control evaluation and development for NiMH, NiCd and Li-Ion chemistries ® Charge current sourced from an on-board switch-mode regulator (up to 2.0 A) ® Fast charge of 3, 6, or 9 NiCd or NiMH cells and 1, 2, or 3 Li-Ion cells ® Fast charge termination by delta temperature/delta time (T/t), negative delta voltage (-V) or peak voltage detect, maximum temperature, maximum time, and maximum voltage for nickel-based and constant-current to constant-voltage for Li-Ion ® -V/peak voltage detect, hold-off, top-off, maximum time, and number of cells are jumper-configurable ® Programmable charge status display ® Discharge-before-charge control with push-button switch or auto discharge-before-charge with jumper ® Inhibit fast charge by logic-level input General Description The DV2004ES3 DV2004ES3 Development System provides a dualchemistry development environment for the bq2004E bq2004E Fast Charge IC. The DV2004ES3 DV2004ES3 incorporates a bq2004E bq2004E and a buck-type switch-mode regulator to provide fast charge control for 3, 6, or 9 NiCd or NiMH cells and 1, 2, or 3 Li-Ion cells. Please review the bq2004E bq2004E data sheet and application note: "Using NiMH and Li-Ion Batteries in Portable Applications", before using the DV2004ES3 DV2004ES3 board. The fast charge is terminated by any of the following: T/t, -V or peak voltage detect, maximum temperature, maximum time, maximum voltage, and inhibit command. Jumper settings select the voltage termination mode, the hold-off, top-off, and maximum time limits, and automatic discharge-before-charge. Connection Descriptions J1 SELC Positive battery terminal and high side of discharge load LOAD Low side of discharge load GND Ground from charger supply DC Jan. 1996 Negative battery terminal and thermistor connection BAT+ The user provides a power supply and batteries. The user configures the DV2004ES3 DV2004ES3 for the number of cells and charge termination mode, and commands dischargebefore-charge with push-button switch S1. Thermistor connection SNS Fast charge for Li-Ion transitions from a constant-current to constant-voltage regulation. Voltage is regulated to within 1%. Charge complete is indicated at the maximum charge time. Chemistry select THERM DC input from charger supply Rev. A Board 1 DV2004ES3 DV2004ES3 JP1 INH Inhibit input JP2 DSEL Display select JP6 NOC Select number of cells JP7 Auto discharge-before-charge select JP8 Auto cycle select Table 1. Lookup Table for D5 Selection +VDC Input (Volts) The DV2004ES3 DV2004ES3 board has the following fixed characteristics: Shorted 1N749 1N749 1N755 1N755 1N758 1N758 1N964A 1N964A 1N966A 1N966A 1N967A 1N967A 0 4.3 7.5 10 13 16 18 32­35 1N968A 1N968A 20 Capacitors C2 and C3 must be changed from those shipped with the board for input voltage in excess of 24V. The thermistor is identified by the serial number suffix as follows: VCC (4.75­5.25V) is regulated on-board from the supply at connector J1 DC. Note: LED1 and LED2 indicate charge status. LED3 can replace LED1 and LED2 and provide an optional tri-color LED feature. Identifier Philips 2322-640-63103 F1 Fenwal Type 16, 197-103LA6-A01 197-103LA6-A01 O1 Ozhumi 150-108-00(4) S1 As shipped from Benchmarq, the DV2004ES3 DV2004ES3 buck-type switch-mode regulator is configured to a charging current of 1.5A. This current level is controlled by the value of sense resistor RSNS by the relationship: Keystone RL0703-5744-103-S1 RL0703-5744-103-S1 (blank) Pin DCMD may be tied to ground through JP7 for automatic discharge-before-charge. With JP7 open, a toggle of switch S1 momentarily pulls DCMD low and initiates a discharge-before-charge. The bq2004E bq2004E output activates FET Q1, allowing current to flow through an external current-limiting load between BAT+ and LOAD on connector J1. Thermistor K1 Charge initiates on the later application of the battery or DC, which provides VCC to the bq2004E bq2004E. ICHG = Nominal Zener Voltage Below 15 15­18 18­21 21­24 24­27 27­30 30­32 Fixed Configuration Motorola Part No. Semetic 103AT-2 103AT-2 Jumper-Selectable Configuration The DV2004ES3 DV2004ES3 must be configured as described below. 0.225V RSNS INH (JP1): Enables/disables charge inhibit (see bq2004E bq2004E data sheet). The inductor is configured for a maximum of 1.5 Amp and should not be adjusted without consulting Benchmarq. Jumper Setting [12]3 1[23] Zener diode D5 is used to limit Q4 VGS per a given DC voltage. The board is shipped with D5 shorted. The user can modify this Zener diode for the application. Refer to Table 1 for suggested D5 values for DC voltages. Pin State Disabled (high) Enabled (low) With the provided NTC thermistor connected between THERM and SNS, values are: LTF = 0°C, HTF = 40°C, and TCO = 60°C. The T/t settings at 30°C (TT) are: minimum = 0.82°C/minute, typical = 1.10°C/minute. Rev. A Board Jan. 1996 2 DV2004ES3 DV2004ES3 Number of Cells (JP6): A resistor-divider network is provided to select 3, 6, or 9 cells (the resulting resistor value equals N/2 ­ 1 cells). Closed Jumper RB22 RB21 RB20 AUTO CYCLE SELECT (JP8): Jum pi ng JP8 automatically initiates a continuous discharge-beforecharge / fast-charge cycling for data collection purposes. Number of Cells NiCd/NiMH 9 6 3 Setup Procedure Li-Ion 3 2 1 1. 2. Connect the provided thermistor or a 10K resistor between THERM and SNS. 3. If using the discharge-before-charge or auto-cycle options, connect a current-limiting discharge load between BAT+ and LOAD. 4. For nickel-based battery, attach the battery pack to BAT+, SNS, and THERM. SELC should float. For Li-Ion, SELC must be connected to BAT+ to operate properly. 5. Temperature Disable: Connecting a 10K resistor between THERM and SNS disables temperature control. Configure TM1, TM2, DSEL, INH, and number-ofcells (NOC) jumpers. Attach DC current source to DC (+) and GND (­) connections in J1. DSEL (JP2): Selects LED1 and LED2 (LED3 optional) display state (see bq2004E bq2004E data sheet, Table 2, page 5). VSEL (JP3): Selects -V or peak-voltage detection, or disables voltage-based termination (see bq2004E bq2004E data sheet, page 7). AUTO DIS SELECT (JP7): Jumping JP7 enables automatic discharge-before-charge. Recommended DC Operating Conditions Symbol Description Minimum Typical Maximum Unit IDC Maximum input current - - 1.5 A VDC Maximum input voltage 2.0 + VBAT or 15 - 18 + VBAT or 35 V VBAT BAT input voltage - - 24 V VTHERM THERM input voltage 0 - 5 V IDSCHG Discharge load current - - 2 Notes A Note: Note 1 1. The VDC+ limits consider the appropriate Zener diode at D5. The voltage at D5 is application-specific and limits the VGS of Q4 to a safe enhancement value during Q4 conduction. See Table 1 for recommended D5 selections per VDC+. Jan. 1996 Rev. A Board 3 DV2004ES3 DV2004ES3 DV2004ES3 DV2004ES3 Board Schematic Rev. A Board Jan. 1996 4 DV2004ES3 DV2004ES3 DV2004ES3 DV2004ES3 Board Schematic Continued Jan. 1996 Rev. A Board 5