bq25010/11/12/15/17 (bqHYBRID) EVM for Single-Chip Charger and DC-DC Converter for Bluetooth Headsets and Other Portable Applications User's Guide June 2007 SLUU214A
bq25010/11/12/15/17 (bqHYBRID) EVM for Single-Chip Charger and DC-DC Converter for Bluetooth Headsets and Other Portable Applications User's Guide Literature Number: SLUU214A December 2004 – Revised June 2007
Chapter 1 SLUU214A – December 2004 – Revised June 2007 Introduction 1.1 EVM Features • • • • • • • 1.2 Programmable charge current up to 500 mA for bq25010/11/12 and up to 1000 mA for bq25015/17 Charges from both USB and ac adapter sources Supports single chemistry applications The output voltage of an integrated 1-MHz synchronized buck converter is either adjustable from 0.7 V to VBAT (bq25010/15), fixed at 3.3 V (bq25011), or fixed at 1.
www.ti.com I/O Description 1.3 I/O Description Jack 1.
www.ti.com Recommended Output Inductor and Capacitor Values of the DC-DC Converter 1.6 Recommended Output Inductor and Capacitor Values of the DC-DC Converter Part # bq25010/15 DC-DC Converter Output Voltage 0.7 V (1) bq25011 or bq25010/15 3.3 V (2) bq25012/17 or bq25010/15 1.8 V (3) (1) (2) (3) Converter Load Current (mA) Output Inductance, L (μH) Output Capacitance, C (μF) Inductor Peak Current (mA) 20 292–620 0.33–0.169 26–23 50 220 0.47 57.5 100 120 0.82 115 20 120 0.
Introduction SLUU214A – December 2004 – Revised June 2007 Submit Documentation Feedback
Chapter 2 SLUU214A – December 2004 – Revised June 2007 Basic Functions Evaluation 2.1 Equipment 2.1.1 POWER SUPPLIES Two power supplies capable of supplying 6 V at 1 A are required. 2.1.2 METERS Three Fluke 75 (equivalent or better) or Two equivalent voltmeters and an equivalent ammeter 2.1.3 OSCILLOSCOPE An oscilloscope and a single voltage probe are required. 2.1.4 COMPUTER A computer with at least one USB port and a USB cable 2.1.5 COMPONENTS A 5-Ω, 50-W resistor A 12-Ω, 0.5-W resistor A 36-Ω, 0.
www.ti.com PROCEDURE Current Meter Power Supply #1 bqHYBRID EVM AC BAT+ (J1) (J4) Io 5W 50 W Power Supply #2 BAT– Computer USB RL 12 W 0.5 W SYS (J3) EN B0235-01 Figure 2-1. Original Test Setup (Setup A) 2.3 PROCEDURE 1. Make sure the Equipment Setup steps are followed. Turn on power supply #2. Then turn on the computer. 2. USB Input Precharge. Verify output voltage, BAT+, is about 2 VDC. Verify the red LED (D3) and green LED (D2) are lit while the green LED (D4) is off.
www.ti.com PROCEDURE voltage of power supply #2 slowly to 4.2 V. Disconnect J6 pin 1 (EN) from pin 2 (DC–). Make J6 pin 1 (EN) open. Verify the voltage across RL (SYS to DC–) is regulated between 1.75 V and 1.85 V. Verify the voltage at the SW pin, or terminal 1 of L1, is like that shown in Figure 2-3. Verify that its frequency is about 1 MHz and the duty cycle is stable at some value between 0.38 and 0.5. G001 Figure 2-3. Waveform at Pin SW 10.
www.ti.com PROCEDURE G002 Figure 2-5. Waveform at Pin SW 11. Converter Enable and Disable. Disconnect the current meter, the 5-Ω, 50-W resistor, and power supply #2 from J4. Short J6 pin 1 (EN) and pin 2 (DC–). Verify the voltage of SYS (J3) is below 100 mV. 12. No Battery Load With DC-DC Converter Disabled, Switch From Charge to Charge Done to Recharge, Back and Forth. Make sure the setup has been changed to setup D, as shown in Figure 2-6. Verify that the LEDs, D3 and D2, alternate being lit.
www.ti.com PROCEDURE G003 Figure 2-7. BAT+ Waveform at No Load 13. No Battery; Charger Connected to System Directly. Connect the 500-Ω, 0.25-W resistor across J4 (BAT+ and BAT–). Make sure the test setup has been changed to setup E, as shown in Fig. 8. Verify the red LED (D3) and green LED (D4) are on and the green LED (D2) is off. Verify the voltage across BAT+ and BAT– is regulated between 4.160 V and 4.240 V. bqHYBRID EVM BAT+ (J4) Power Supply #1 AC (J1) 500 W 0.25 W BAT– SYS (J3) EN RL 36 W 0.
Basic Functions Evaluation SLUU214A – December 2004 – Revised June 2007 Submit Documentation Feedback
Chapter 3 SLUU214A – December 2004 – Revised June 2007 Bill of Materials, Board Layout, and Schematic 3.1 Bill of Materials bq2501x RefDes DESCRIPTION MFR Part Number 805 Panasonic ECJ-2YB0J225K Capacitor, ceramic, 10-μF, 6.3-V, X5R, 20% 805 Panasonic ECJ-2FB0J106M C4, C6 Capacitor, ceramic, 10-μF, 6.
www.ti.com Board Layout bq2501x 3.2 x=0 -001 x=1 -002 x=2 -003 x=5 -004 x=7 -005 RefDes DESCRIPTION SIZE MFR Part Number 3 3 3 3 3 R4, R5, R6 Resistor, chip, 1.5-kΩ, 1/16-W, 603 1% Std Std 1 1 1 1 1 R7 Resistor, chip, 1.
www.ti.com Board Layout 2.210" (56.134 mm) 1.520" (38.608 mm) K003 Figure 3-2. Layer 1 2.210" (56.134 mm) 1.520" (38.608 mm) K004 Figure 3-3.
www.ti.com Board Layout Figure 3-4. Mask 1 Figure 3-5. Mask 2 2.210" (56.134 mm) 1.520" (38.608 mm) K002 Figure 3-6.
www.ti.com Schematic Schematic S001 3.3 Figure 3-7.
www.ti.com Schematic EVALUATION BOARD/KIT IMPORTANT NOTICE Texas Instruments (TI) provides the enclosed product(s) under the following conditions: This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have electronics training and observe good engineering practice standards.
www.ti.com Schematic EVM WARNINGS AND RESTRICTIONS It is important to operate this EVM within the charge regulation input voltage range of 4.35 V to 6.5 V and the adapter output voltage range of 0 V to 4.2 V. Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions concerning the input range, please contact a TI field representative prior to connecting the input power.
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
