Datasheet

ManualsBrandsST ManualsBattery Charger ICsBattery Charger, Li-Ion, 4.25 ... 6.5V, 800mA, DFN6

DFN6 (3 x 3 mm)

Features

• Programmable charge current up to 800 mA

• No external MOSFET, sense resistors or blocking diode are required

• Complete linear charger for single-cell Li-Ion batteries

• Constant current/constant voltage operation with thermal regulation to maximize

charge rate without risk of overheating

• Two charge status output pins

• Charge single-cell Li-Ion batteries directly from USB port

• Preset 4.2 V charge voltage with 1% accuracy

• Charge current monitor for gas gauge

• Automatic recharge

• Undervoltage lockout

• C/10 charge termination

• 25 µA supply current in shutdown mode

• Low battery voltage detection for pre-charge setting

• Soft-start feature limits inrush current

• DFN6 (3 x 3 mm) package (to improve power dissipation)

Applications

• Cellular phones

• PDAs

• Bluetooth® applications

• Battery-powered devices

Description

The STBC08 is a constant current/constant voltage charger for single-cell Li-Ion

batteries.

Neither external sense resistor nor blocking diode are required. The STBC08 is

designed to work within USB power specifications. An internal block regulates the

current when the junction temperature increases, to protect the device when it

operates in high power or high ambient temperature conditions. The charge voltage

is fixed at 4.2 V, and current limitation can be programmed using a single resistor

connected between PROG pin and GND. The charge cycle is automatically

terminated when the current, which flows to the battery, is 1/10 of the programmed

value. If the external adapter is removed, the STBC08 turns off and a 2 μA current

can flow from the battery to the device.

The device can be in shutdown mode, reducing the supply current to 25 μA.

The device also has a charge current monitor, undervoltage lockout, automatic

recharge. The charge termination and input voltage presence are indicated by two

separated status pins.

Maturity status link

STBC08

Device summary

Order code STBC08PMR

Package DFN6 (3 x 3 mm)

Packaging 4500 pieces/reel

800 mA standalone linear Li-Ion battery charger with thermal regulation

STBC08

Datasheet

DS4901 - Rev 4 - November 2018

For further information contact your local STMicroelectronics sales office.

www.st.com

Summary of content (20 pages)

PAGE 1
STBC08 Datasheet 800 mA standalone linear Li-Ion battery charger with thermal regulation Features DFN6 (3 x 3 mm) • • • • • • • • • • • • • • • Programmable charge current up to 800 mA No external MOSFET, sense resistors or blocking diode are required Complete linear charger for single-cell Li-Ion batteries Constant current/constant voltage operation with thermal regulation to maximize charge rate without risk of overheating Two charge status output pins Charge single-cell Li-Ion batteries directly fro
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STBC08 Application diagram 1 Application diagram Figure 1.
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STBC08 Pin configuration 2 Pin configuration Figure 2. Pin connection (top view) Table 1. Pin description Pin Symbol Notes 1 BAT This pin provides an accurate output voltage of 4.2 V and the charge current to the battery. Only 2 µA reverse current can flow to the device when it is in shutdown mode. 2 POWER ON Open drain. When the STBC08 detects an undervoltage lockout condition or when the external adapter provides an input voltage higher than 7.
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STBC08 Maximum ratings 3 Maximum ratings Table 2. Absolute maximum ratings Symbol Parameter Value Unit VCC Input supply voltage From - 0.3 to 10 V VBAT Battery pin voltage From - 0.3 to 7 V VPROG PROG pin voltage From - 0.3 to VCC+ 0.3 V VCHRG CHRG pin voltage From - 0.3 to 7 V POWER ON pin voltage From - 0.3 to 7 V From - 0.3 to VREF + 0.
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STBC08 Electrical characteristics 4 Electrical characteristics VCC = 5 V, CI = 1 µF, TJ = - 40 °C to 85 °C unless otherwise specified. Table 4. Electrical characteristics Symbol VCC ICC Parameter Test conditions Supply voltage 150 300 RPROG not connected 21 40 VCC < VBAT 17 50 VCC < VUV 17 40 4.158 4.2 4.242 V 90 100 110 mA 465 500 535 mA 0 -2.
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STBC08 Electrical characteristics Symbol Parameter Test conditions Current mode Min. Typ. Max. Unit 0.93 1.0 1.07 V 0.35 0.6 V VPROG PROG pin voltage VCHRG CHRG pinpulldown voltage ICHRG = 5 mA POWER ON pin leakage current Pull-up POWER ON pin pull-down voltage IPOWER_ON = 5 mA 0.
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STBC08 Typical performance characteristics 5 DS4901 - Rev 4 Typical performance characteristics Figure 4. IBAT vs. supply voltage Figure 5. VBAT vs. VCC Figure 6. IBAT vs. temperature Figure 7. VPROG vs.
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STBC08 Typical performance characteristics Figure 8. IBAT / IPROG vs. temperature Figure 9. Recharge battery threshold voltage vs. temperature Figure 10. IBAT / IPROG vs. VCC Figure 11. IBAT vs. VBAT Figure 12. VCHRG vs. temperature (CHRG pin output low voltage) Figure 13. IBAT vs.
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STBC08 Typical performance characteristics Figure 14.
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STBC08 Application information 6 Application information The STBC08 uses an internal P-channel MOSFET to work in constant current and constant voltage method. It provides up to 800 mA with a final regulated output voltage of 4.2 V ±1% in full temperature range. Neither blocking diode nor sensing resistor are required. The USB port can be used as a power supply voltage. 6.
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STBC08 Programming charge current 6.6 Programming charge current RPROG resistor sets the charge current value. The battery charge current is 1000 times the PROG pin current value. The program resistor and the charge current are calculated according to the following equation: VPROG RPROG = 1000 × IBAT (2) The charge current out of BAT pin can be monitored by PROG pin voltage as per below equation: 6.
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STBC08 Package information 7 Package information In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK® packages, depending on their level of environmental compliance. ECOPACK® specifications, grade definitions and product status are available at: www.st.com. ECOPACK® is an ST trademark. 7.1 DFN6 (3 x 3 mm) package information Figure 15.
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STBC08 DFN6 (3 x 3 mm) package information Table 6. DFN6 (3 x 3 mm) package mechanical data Dim. mm Min. A 0.80 A1 0 A3 Typ. Max. 1 0.02 0.05 0.20 b 0.23 D 2.90 D2 2.23 E 2.90 E2 1.50 0.45 3 3.10 2.50 3 3.10 1.75 0.95 L 0.30 0.40 0.50 Figure 16.
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STBC08 DFN6 (3 x 3 mm) packing information 7.2 DFN6 (3 x 3 mm) packing information Figure 17.
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STBC08 DFN6 (3 x 3 mm) packing information Figure 18. DFN6 (3 x 3 mm) reel outline 7875978_N Table 7. DFN6 (3 x 3 mm) tape and reel mechanical data Dim. DS4901 - Rev 4 mm Min. Typ. Max. A0 3.20 3.30 3.40 B0 3.20 3.30 3.40 K0 1 1.10 1.
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STBC08 Revision history Table 8. Document revision history Date Revision 04-Sep-2006 1 Changes Initial release. Added exposed pad pin to Table 2. 29-May-2014 2 Updated ITERM parameter in Table 5. Modified Table 6. Minortext changes. DS4901 - Rev 4 17-Jul-2017 3 Updated Table 5. 28-Nov-2018 4 Updated VBAT value in Table 2. Absolute maximum ratings.
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STBC08 Contents Contents 1 Application diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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STBC08 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Table 8. Pin description. . . . . . . . . . . . . . . . . . . . . . . . Absolute maximum ratings . . . . . . . . . . . . . . . Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . Electrical characteristics . . . . . . . . . . . . . . . . . Flag status values for CHRG pin . . . . . . . . . . . DFN6 (3 x 3 mm) package mechanical data . . .
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STBC08 List of figures List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. Figure 12. Figure 13. Figure 14. Figure 15. Figure 16. Figure 17. Figure 18. DS4901 - Rev 4 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . Application circuit . . . . . . . . . . . . . . . . . . . . . . . . . . IBAT vs. supply voltage. . . . . . . . . . . . . . . . .
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STBC08 IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement.