Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsPMICsPMIC - battery management Charge management, Power management Li-Ion DFN 12 (3x3) Surface-m

This is information on a product in full production.

July 2013 DocID024654 Rev 2 1/29

STNS01

Li-Ion linear battery charger with LDO

Datasheet

production data

Features

• Charges single-cell Li-Ion batteries with CC-CV

algorithm and charge termination

• Charge current programmable up to 200 mA

• 1% accuracy on floating voltage (4.2 V)

• Integrated 3.1 V LDO regulator

• Automatic power path management

• Battery overcharge protection

• Battery overdischarge protection

• Battery overcurrent protection

• Charging timeout

• Very low battery leakage in

overdischarge/shutdown mode

• Low quiescent current

• Charge/fault status output

• Charger enable input

• Available in a 12-lead (3 x 3 mm²) DFN

package

Applications

• Portable MP3 players

• Portable low-power devices

• Fitness portable devices

Description

The STNS01 is a linear charger for single-cell Li-

Ion batteries integrating an LDO regulator and

several battery protection functions.

The device uses a CC/CV algorithm to charge the

battery. The fast-charge current can be

programmed using an external resistor. Pre-

charge current and termination current are scaled

accordingly. The floating voltage value is 4.2 V.

The input supply voltage is normally used to

charge the battery and provide power to the LDO

regulator. When a valid input voltage is not

present and the battery is not empty, the device

automatically switches to battery power.

The STNS01 integrates overcharge,

overdischarge and overcurrent protection circuitry

to prevent the battery from being damaged under

fault conditions. It also features a charger enable

input to stop the charging process when battery

overtemperature is detected by external circuitry.

When the shutdown mode is activated, the battery

power consumption is reduced to less than

500 nA to maximize battery life during shelf time

or shipping.The device is available in a 3 × 3 mm²

12-lead DFN package.

DFN12L (3 x 3 mm²)

Table 1. Device summary

Order code Package Packaging

STNS01PUR DFN12L (3 x 3 mm²) 3000 parts per reel

www.st.com

Summary of content (29 pages)

PAGE 1
STNS01 Li-Ion linear battery charger with LDO Datasheet - production data Applications • Portable MP3 players • Portable low-power devices • Fitness portable devices Description The STNS01 is a linear charger for single-cell LiIon batteries integrating an LDO regulator and several battery protection functions. DFN12L (3 x 3 mm²) Features • Charges single-cell Li-Ion batteries with CC-CV algorithm and charge termination • Charge current programmable up to 200 mA • 1% accuracy on floating voltage (4.
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Contents STNS01 Contents 1 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Electrical characteristics . . . .
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STNS01 1 Schematic Schematic Figure 1. Application schematic LOAD LDO VBUS CLDO IN GND RCHG CIN System CHG Alternative Load CEN SYS SD CSYS RDIV1 RDIV2 BATMS NTC ISET BATSNS RISET BAT GND CBAT T Battery Pack AM09934v1 Table 2. List of external components Component Manufacturer Part number / Description Value Size CIN Murata GRM188R71A225KE15D 2.2 μF 0603 CSYS Murata GRM188R71A225KE15D 2.2 μF 0603 CLDO Murata GRM188R71A225KE15D 2.
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Block diagram 2 STNS01 Block diagram Figure 2. STNS01 Block diagram USB Power Supply M1 M2 IN SYS (SOURCE) LDO. 3.
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STNS01 3 Pin configuration Pin configuration Figure 3. Pin configuration (top view) IN BAT SYS BATSNS LDO BATMS SD ISET CHG NTC CEN GND AM12708v1 Table 3. Pin description Pin name Pin number Description IN 1 Input supply voltage. Bypass this pin to ground with a 2.2 μF capacitor SYS 2 System output. Bypass this pin to ground with a 2.2 μF ceramic capacitor LDO 3 3.1 V LDO output. Bypass this pin to ground with a 1 μF ceramic capacitor SD 4 Shutdown. Active high.
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Maximum ratings 4 STNS01 Maximum ratings Table 4. Absolute maximum ratings Symbol VIN Note: Parameter Input supply voltage pin Test conditions Value Unit DC voltage -0.3 to +10.0 V Non repetitive, 60s pulse length -0.3 to +16.0 V VLDO LDO output pin voltage DC voltage -0.3 to +4.0 V VSYS SYS pin voltage DC voltage -0.3 to +6.5 V VCHG CHG pin voltage DC voltage -0.3 to +6.5 V VLGC Voltage on logic pins (CEN, SD) DC voltage -0.3 to +4.
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STNS01 5 Electrical characteristics Electrical characteristics The values given in the following table are valid for - 40 °C < TJ < + 85 °C, VIN = 5 V, VBAT = 3.6 V, CLDO = 1 μF, CBATT = 4.7 μF, CIN = CSYS = 2.2 μF, RISET = 1 kΩ, SD = Low, CEN = High, unless otherwise specified. Table 6.
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Electrical characteristics STNS01 Table 6. Electrical characteristics (continued) Symbol Parameter Test conditions Min. Typ. Max. Unit VODCR Battery voltage overdischarge release threshold 3.0 RON-IB Input to battery on-resistance 1 1.5 Ω RON-BS Battery to sys on-resistance ISINK = 100 mA 0.38 0.55 Ω BATSNS to BATMS onresistance ISINK = 500 μA 270 BATMS VOL Output low level (CHG) ISINK = 5 mA 0.4 V VIL Logic LOW input level (SD, CEN) VLDO = 3.1 V 0.
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STNS01 Electrical characteristics Table 6. Electrical characteristics (continued) Symbol Parameter Test conditions Min. Typ. Max. Unit tOCD Overcharge detection delay VBAT > VOCHG, VUVLO < VIN < VINOVP 1.
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Typical performance characteristics (curves) 6 STNS01 Typical performance characteristics (curves) Figure 4. Start-up Figure 5. Start - up VBAT = 0 V LDO 2 V/div VBAT 1 V/div VSYS 2 V/div LDO 2 V/div VIN 2 V/div VSYS 2 V/div VIN 2 V/div ICHG 0.05 A/div 100 ms/div 100 ms/div VIN = 0 V to 5 V, VBAT = 3.6 V, ICHG = 200 mA VIN = 0 V to 5 V, VBAT = 30 V, ICHG = 100 mA Figure 6. Input OVP Figure 7. IPRE-CHG to IFAST-CHG VIN 3 V/div LDO 3 V/div VBAT 0.9 V/div VBAT 3 V/div IFAST-CHG ICHG 0.
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STNS01 Typical performance characteristics (curves) Figure 10. RON-BS vs. temperature Figure 11. Battery voltage vs. charge current 0.6 4.24 4.23 0.5 4.22 4.21 VBAT (V) RONBS 0.4 0.3 0.2 4.2 4.19 4.18 0.1 4.17 V IN = 5 V, V B AT = 3.6 V, I C HG = 100 mA 0 -100 4.16 -50 0 50 Temperature 100 150 0 Figure 12. Load transient LDO pre-chg 100 ILDO 0.02 A/div LDO 0.1 V/div Offset 3.1 V LDO 0.1 V/div Offset 3.
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Functional pin description 7 STNS01 Functional pin description Pin 1: IN 5 V input supply voltage. This pin supplies power to the SYS pin and the battery charger when the input voltage is higher than VUVLO and lower than VINOVP. Bypass this pin to GND with a 2.2 μF ceramic capacitor. Pin 2: SYS LDO input voltage. This pin can be used to supply up to 100 mA to external devices. The voltage source of this pin can be either IN or BAT depending on the operating conditions. Refer to Table 7 for more details.
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STNS01 Functional pin description Figure 16. Shutdown mode entry and exit (not to scale, deglitch times not included) VBAT VODCR VODC VIN VINOVP VUVLO SD The Shutdown The Shutdown image cannot be display ed . Your computer may not hav e enough memory to open the image, or the image may hav e been corrupte d. Restart y our computer and t The Shutdown image canno t be displa y ed.
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Functional pin description STNS01 If the charger is temporarily stopped because of the battery temperature being out of the normal range, a logic low level on the CEN pin disables the charger and resets the charging timeout timers. If CEN is then driven high again the charger is restarted only if a no-fault condition is active (including battery temperature out of range). This pin has an internal 500 kΩ pull-up resistor connected to LDO and must be left floating or tied high at power on. Figure 17.
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STNS01 Functional pin description Pin 11: BATSNS Battery voltage sense pin. This pin is needed to ensure accuracy on the floating voltage and battery voltage protection thresholds. The BATSNS pin must be connected as close as possible to the battery's positive terminal. Pin 12: BAT Battery's positive terminal connection pin. Bypass this pin to GND with a 4.7 μF ceramic capacitor.
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Operation description 8 STNS01 Operation description The STNS01 is a power management IC integrating a battery charger with power path function, battery protection circuitry, battery temperature monitoring and a 3.1 V 100 mA LDO. When a valid input voltage (VIN) is present on the IN pin, after security checks are performed, the battery charger starts charging the battery using a constant-current/constantvoltage charging algorithm.
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STNS01 Operation description Once the fast-charge phase has started, if the battery voltage decreases again below VPRE, the charging process is stopped and a fault is signaled. The constant-current fast-charge phase lasts as long as the battery voltage is lower than VFLOAT. When VBAT reaches VFLOAT, the charging algorithm switches to constant-voltage (CV) mode. During the CV mode the battery voltage is regulated to VFLOAT and the charging current starts decreasing.
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Operation description STNS01 Figure 18.
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STNS01 Operation description Figure 19. CC-CV charging profile (not to scale) AM09939v1 I BAT VBAT VFLOAT CC OFF PRE FAST CV FAST OFF I FAST VPRE I PRE I END t 8.3 4.4 4.2 4 3.8 3.6 3.4 3.2 3 VBATT 2.8 IBATT 2.6 2.4 2.2 V = 5 V; VSYS No Load; LDO Load = 100 mA; RISET = 1 kΩ 2 IN 8:55 9:38 10:22 11:05 11:48 Time [h:m] AM17198v1 0.24 0.22 0.2 0.18 0.16 0.14 0.12 0.1 0.08 0.06 0.04 0.02 0 IBATT [mA] VBATT [V] Figure 20.
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Operation description STNS01 If the temperature goes back into the normal operating range before the maximum charging time has elapsed, the charging process is resumed from where it left off and the alarm signal is cleared. If the charging timeout expires while the temperature is still outside the normal operationg range, the charging process is stopped but can be restarted using the CEN pin. Both temperature thresholds feature a 3 °C hysteresis.
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STNS01 8.6 Operation description Battery discharge overcurrent protection When the STNS01 is powered from the BAT pin, a discharge overcurrent protection circuit disables the device if the battery current exceeds IBATOCP for more than tDOD. A valid input voltage (VIN) must be connected to restore normal operating conditions. 8.
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Operation description 8.12 STNS01 Reverse current protection In order to prevent undesired battery discharge, when the input voltage (VIN) is lower than the battery voltage (VBAT), the current path from BAT to IN is blocked.
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STNS01 9 Package mechanical data Package mechanical data 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 registered trademark. Table 9. DFN12L (3 x 3 x 0.75 mm) mechanical data mm inch Dim. Min. Typ. Max. Min. Typ. Max. A 0.70 0.75 0.80 0.028 0.030 0.031 A1 0 0.
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Package mechanical data STNS01 Figure 22. DFN12L (3 x 3 x 0.
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STNS01 Package mechanical data Figure 23. Tape drawing (dimensions in mm.
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Package mechanical data STNS01 Figure 24. Reel drawing (dimensions in mm.
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STNS01 Package mechanical data Figure 25.
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Revision history 10 STNS01 Revision history Table 10. Document revision history 28/29 Date Revision Changes 17-May-2013 1 Initial release. 15-Jul-2013 2 Updated Table 6: Electrical characteristics.
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STNS01 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.