SPV1040
Datasheet
High efficiency solar battery charger with embedded MPPT
Features
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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
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Product status link
SPV1040
Product summary
Order code
Package
Packing
Order code
Package
Packing
SPV1040T
TSSOP8
Tube
SPV1040TR
TSSOP8
Tape and reel
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
pk
) 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 label
DS6991
-
Rev 9
-
February 2021
For further information contact your local STMicroelectronics sales office.
www.st.com
SPV1040
Pin description
2
Pin description
Table 1.
Pin description
Pin
1
2
3
4
5
Name
MPP-SET
GND
LX
VOUT
VCTRL
Type
I
Ground
I
O
I
Description
Non-inverting input to sense
the PV cell voltage. It cannot
be left floating.
Power ground reference.
Booster inductor connection.
Booster output voltage.
Inverting input of constant
Voltage control loop. It cannot
be left floating.
Inverting input of constant
current control loop.
Connect to GND if not used:
cannot be left floating.
Non-inverting input of
constant current control loop.
Connect to GND if not used:
cannot be left floating.
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.
6
ICTRL_MINUS
I
7
ICTRL_PLUS
I
Figure 3.
Pin connection top view
1
2
3
4
MPP-SET
GND
LX
VOUT
XSHUT
ICTRL_PLUS
ICTRL_MINUS
VCTRL
8
7
6
5
AM02613v1
DS6991
-
Rev 9
page 3/16
SPV1040
Electrical ratings
3
Electrical ratings
Table 2.
Absolute maximum ratings
Symbol
VOUT
LX
VOUT-V
LX
MPP-SET
VOUT-V
MPP-SET
XSHUT
VOUT-V
XSHUT
ICTRL_PLUS
ICTRL_MINUS
VCTRL
GND
VOUT pin voltage range
LX pin voltage range
Maximum voltage drop between VOUT and LX pins
Analog input
Maximum voltage drop between VOUT and MPPT pins
Analog input
Maximum voltage drop between VOUT and X-SHUT pins
Analog input
Analog input
Analog input
Ground
Parameter
Value
[-0.3, 5.5]
[-5.5, VOUT]
[5.5]
[-5.5, VOUT]
[5.5]
[-5.5, VOUT]
[5.5]
[-0.3, VOUT]
[-0.3, VOUT]
[-0.3, VOUT]
0
V
Unit
Table 3.
Thermal data
Symbol
R
thj-amb
T
jop
T
stg
Parameter
Thermal resistance, junction-to-ambient
Junction operating temperature
Storage temperature
Value
135
-40 to 125
-40 to 150
Unit
°C/W
°C
°C
Note:
R
thJA
has been measured on a 2-layer PCB: FR4, 35 μm Cu thickness, 2.8 cm
2
DS6991
-
Rev 9
page 4/16
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