Datasheet

ManualsBrandsST ManualsBattery Charger ICsSolar Battery Charger, 300mV ... 5.5V, 1.8A, TSSOP

Features

• 0.3 V to 5.5 V operating input voltage

• 140 mΩ internal synchronous rectifier

• 120 mΩ internal power active switch

• 100 kHz fixed PWM frequency

• Duty cycle controlled by MPPT algorithm

• Output voltage regulation, overcurrent and overtemperature protection

• Input source reverse polarity protection

• Built-in soft-start

• Up to 95% efficiency

• TSSOP8 package 3x4.4 mm

Applications

• Smart phones and GPS systems

• Wireless headsets

• Small appliances, sensors

• Portable media players

• Digital still cameras

• Toys and portable healthcare

Description

The SPV1040 device is a low power, low voltage, monolithic step-up converter with

an input voltage range from 0.3 V to 5.5 V, capable of maximizing the energy

generated by solar cells (or fuel cells), where low input voltage handling capability is

extremely important. Thanks to the embedded MPPT algorithm, even under varying

environmental conditions (such as irradiation, dirt, temperature) the SPV1040 offers

maximum efficiency in terms of power harvested from the cells and transferred to the

output. The device employs a voltage regulation loop, which fixes the charging

battery voltage via a resistor divider.

It is possible to set the maximum output current according to charging requirements

by a sense resistor .

The SPV1040 protects itself and other application devices by stopping the PWM

switching if either the maximum current threshold (up to 1.8 A

) is reached or the

maximum temperature limit (up to 155 °C) is exceeded. An additional built-in feature

of the SPV1040 is the input source reverse polarity protection, which prevents

damage in case of reverse connection of the solar panel on the input.

Product status link

SPV1040

Product summary

Order code SPV1040T

Package TSSOP8

Packing Tube

Order code SPV1040TR

Package TSSOP8

Packing Tape and reel

Product label

High efficiency solar battery charger with embedded MPPT

SPV1040

Datasheet

DS6991 - Rev 8 - January 2020

For further information contact your local STMicroelectronics sales office.

www.st.com

Summary of content (17 pages)

PAGE 1
SPV1040 Datasheet High efficiency solar battery charger with embedded MPPT Features • • • • • • • • • • 0.3 V to 5.5 V operating input voltage 140 mΩ internal synchronous rectifier 120 mΩ internal power active switch 100 kHz fixed PWM frequency Duty cycle controlled by MPPT algorithm Output voltage regulation, overcurrent and overtemperature protection Input source reverse polarity protection Built-in soft-start Up to 95% efficiency TSSOP8 package 3x4.
PAGE 2
SPV1040 Block diagram 1 Block diagram Figure 1. Block diagram VOUT Lx START SI GNAL ZERO- CROSSI NG DETECTOR + VREF ANALOG BLOCK I CTRL_PLUS V MPP- REF OVERTEMPERATURE REVERSE POLARI TY MPP BLOCK - CONTROL DRI VERS I CTRL_MI NUS CLOCK MPP- SET + OVERCURRENT CLOCK Bur st Ref XSHUT BURST MODE PWM + DI GI TAL CORE - DAC CODE I out Reg Vin Reg Vo ut Reg GND V MPP- REF MPP- SET + - VCTRL VREF Figure 2.
PAGE 3
SPV1040 Pin description 2 Pin description Table 1. Pin description Pin Name Type 1 MPP-SET I 2 GND Ground Description Non-inverting input to sense the PV cell voltage. It cannot be left floating. Power ground reference. Shutdown input pin: XSHUT = low, the device in power off mode. 8 XSHUT I XSHUT = high, the device is enabled for operating mode. This pin cannot be left floating. 3 LX I Booster inductor connection. I Non-inverting input of constant current control loop.
PAGE 4
SPV1040 Electrical ratings 3 Electrical ratings Table 2. Absolute maximum ratings Symbol MPP-SET GND Parameter Analog input Ground Value Unit [-5.5, VOUT] 0 XSHUT Analog input [-5.5, VOUT] LX Analog input [-5.5, VOUT] ICTRL_PLUS Analog input [-0.3, VOUT] ICTRL_MINUS Analog input [-0.3, VOUT] VCTRL Analog input [-0.3, VOUT] VOUT Analog output V [-0.3, 5.5] Table 3.
PAGE 5
SPV1040 Electrical characteristics 4 Electrical characteristics VMPP-SET = 0.5 V, VCTRL = Ictrl+ = Ictrl- = GND, XSHUT = 0.5 V, TJ = -40 °C to 125 °C, unless otherwise specified. Table 4. Electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. Unit 0.4 0.45 0.50 V Input source section VMPP-SET Low boost voltage threshold VOUT = 3.3 V Iq Quiescent current ILOAD = 0 mA, VCTRL = 2 V, VOUT = 3.3 V 60 80 ISD Shutdown current VOUT = 3.
PAGE 6
SPV1040 Electrical characteristics Symbol Parameter Test conditions Min. Typ. Max. Unit 70 100 130 kHz FPWM PWM signal frequency VREF Internal VCTRL reference voltage VOUT ≥ 1.8 V, VCTRL increasing 1.2 1.25 1.3 V VICTRL Sensing current offset ICTRL+ - ICTRLdecreasing 40 50 60 mV XSHUT logic low XSHUT increasing 0.27 0.34 XSHUT logic High XSHUT decreasing XSHUT V 0.14 0.
PAGE 7
SPV1040 Typical characteristics 5 Typical characteristics Table 5. Typical Conversion Efficiency VIN[V] PIN[W] POUT/PIN[%] 1.50 0.25 to 2.0 80% to 90% 2.00 0.25 to 2.5 80% to 95% 2.50 0.25 to 3.0 80% to 95% Test conditions (ref to Figure 1): 10uH ≤ L ≤ 100uH (LDCR≤ 0.3Ω); RS = 0Ω; RF1, RF2 and CF unmounted; ICTRL+ = ICTRL-= GND Figure 4. VLX and ILX waveforms - D = 39% DS6991 - Rev 8 Figure 5.
PAGE 8
SPV1040 Detailed description 6 Detailed description The SPV1040 is a monolithic, high efficiency, low voltage, self-powered DC-DC converter that operates over a 0.3 V to 5.5 V DC input voltage range and provides a single output voltage. The device provides regulated output voltage and current by sensing the VCTRL feedback of the external resistor divider and the voltage drop on the external sense resistor Rs, respectively.
PAGE 9
SPV1040 Undervoltage lockout 6.9 Undervoltage lockout In order to prevent batteries from over-discharging, the device turns OFF in case of MPPSET voltage is lower than 0.24 V (no irradiation). A hysteresis has been implemented to avoid unpredictable ON-OFF switching. 6.10 Reverse polarity In order to avoid damage to the device and battery discharge when the solar panel connection is reverse-inserted, a dedicated protection circuit has been implemented.
PAGE 10
SPV1040 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 TSSOP8 package information Figure 7. TSSOP8 package outline Table 6. TSSOP8 package mechanical data Dim. mm Min. Typ. A DS6991 - Rev 8 Max. 1.20 A1 0.05 0.
PAGE 11
SPV1040 TSSOP8 packing information Dim. mm Min. e L Typ. 0.65 0.45 0.60 L1 1.00 L2 0.25 k Max. 0 aaa 0.75 8 0.10 Note: Dimensions D does not include mold flash or protrusions. Mold flash or protrusions do not exceed 0.15 mm per side. Dimension E1 does not include interlead flash or protrusions. Interlead flash or protrusions do not exceed 0.25 mm per side. 7.2 TSSOP8 packing information Figure 8.
PAGE 12
SPV1040 TSSOP8 packing information Figure 9.
PAGE 13
SPV1040 Revision history Table 7. Document revision history Date DS6991 - Rev 8 Revision Changes 08-Oct-2010 1 First release. 06-Apr-2011 2 Updated the cover page, DFN8 information deleted, Chapter 3, Chapter 4 and Chapter 6. 04-Oct-2011 3 25-Jul-2012 4 Updated Figure 4, Figure 5, Figure 6, Figure 7, Figure 8, and Figure 9. 21-Mar-2013 5 Updated Figure 1 and note 1 in Table 5. 26-Sep-2016 6 Added Section 7.2 : "Packing information". 06-Feb-2017 7 Update TSSOP8 package information.
PAGE 14
SPV1040 Contents Contents 1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 3 Electrical ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 15
SPV1040 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Table 6. Table 7. Pin description. . . . . . . . . . . . . . . Absolute maximum ratings . . . . . . Thermal data. . . . . . . . . . . . . . . . Electrical characteristics . . . . . . . . Typical Conversion Efficiency . . . . TSSOP8 package mechanical data Document revision history . . . . . . . DS6991 - Rev 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 16
SPV1040 List of figures List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. DS6991 - Rev 8 Block diagram . . . . . . . . . . . . . . Simplified application circuit . . . . . Pin connection top view . . . . . . . . VLX and ILX waveforms - D = 39% . VLX and ILX waveforms - D = 68% . MPPT working principle . . . . . . . . TSSOP8 package outline . . . . . . . TSSOP8 carrier tape outline. . . . . TSSOP8 reel outline . . . . . . . . . . . . . . . . . . .
PAGE 17
SPV1040 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.