ZSPM4523
High-Efficiency Solar PV MPPT
Regulator for Super Capacitor Systems
Datasheet
Brief Description
Features
The ZSPM4523 is a DC/DC synchronous switching
super capacitor charger with fully integrated power
switches, internal compensation, and full fault pro-
tection. It uses a temperature-independent photo-
voltaic maximum power point tracking (MPPT) calcu-
lator to optimize power output from the source during
Full-Charge Mode. Its 1MHz switching frequency
allows using small filter components, which results in
smaller board space and reduced bill-of-material
costs.
•
•
•
Temperature-independent MPPT regulation
VOUT reverse-current blocking
Programmable temperature-compensated
termination voltage: 2.48 to 2.74 V ± 1%
•
User programmable maximum charge current:
50mA to 1500mA
•
•
•
•
Input supply under-voltage lockout
Full protection for VOUT over-voltage
I2C™ program interface with EEPROM registers
Charge status indication
In Full-Charge Mode, the duty cycle is controlled by
the MPPT function. Once the termination voltage is
reached, the regulator operates in Constant Voltage
Mode. When the regulator is disabled (the EN pin is
low), the device draws 10µA (typical) quiescent
Related IDT Smart Power Products
•
ZSPM4521 High-Efficiency Charger for Li-Ion
Batteries with MPPT Regulator
current from VOUT
.
•
ZSPM4551 High-Efficiency Charger for Li-Ion
Batteries
The ZSPM4523 integrates a wide range of protec-
tion circuitry, including input supply under-voltage
lockout, output over-voltage protection, current
limiting, and thermal shutdown.
•
•
ZSPM4121 Ultra-low Power Under-Voltage Switch
ZSPM4141 Ultra-Low-Power Linear Regulator
The ZSPM4523 includes supervisory reporting via
the NFLT (Inverted Fault) open-drain output to
interface other components in the system. Device
programming is achieved by the I²C™* interface
through the SCL and SDA pins.
Available Support
•
•
Evaluation Kit
Support Documentation
Physical Characteristics
Benefits
•
•
•
Wide input voltage range: 3.2V to 7.2V
Junction operating temperature -40°C to 125°C
Packaged in a 16-pin PQFN (4mm x 4mm)
•
•
Up to 1.5A continuous output current
High efficiency – up to 92% at typical load
ZSPM4523 Application Circuit
Photovoltaic Cells
VIN
CIN
ZSPM4523
GND
VDD
CVdd
LOUT
RSENSE
Super Cap
SW
COUT
SCL
SDA
VSENSE
VOUT
VDD
RPULLUP
(optional)
VDD
RPULLUP
(optional)
EN
NFLT
PGND
* I2C™ is a trademark of NXP.
© 2016 Integrated Device Technology, Inc.
1
January 29, 2016