Data Sheet

ZSPM4551
High-Efficiency Charger for Li-Ion Batteries
Brief Description
Features
The ZSPM4551 is a DC/DC synchronous switching
lithium-ion (Li-Ion) battery charger with fully integrated power switches, internal compensation, and
full fault protection.
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
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Its switching frequency of 1MHz enables the use of
small filter components, resulting in smaller board
space and reduced BOM costs.
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In Full-Charge Constant-Current Mode, the regulation is for constant current (CC). Once termination
voltage is reached, the regulator operates in voltage
mode. When the regulator is disabled (the EN pin is
low), the device draws 10µA (typical) quiescent
current.
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The ZSPM4551 includes supervisory reporting
through the NFLT (inverted fault) open-drain output
to interface other components in the system. Device
programming is achieved by an I²C™* interface
through the SCL and SDA pins.
VBAT reverse-current blocking
Programmable temperature-compensated
termination voltage: 3.94V to 4.18V ± 1%
User programmable maximum charge current:
50mA to 1500mA
Current mode PWM control in constant voltage
Supervisor for VBAT reported at the NFLT pin
Input supply under-voltage lockout
Full protection for over-current, over-temperature,
VBAT over-voltage, and charging timeout
Charge status indication
2
I C™ program interface with EEPROM registers
Related ZMDI Smart Power Products


ZSPM4121 Ultra-low Power Under-Voltage
Switch
ZSPM4141 Ultra-Low-Power Linear Regulator
Benefits
Physical Characteristics
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Up to 1.5A of continuous output current in FullCharge Constant-Current (CC) Mode
High efficiency – up to 92% with typical loads
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Wide input voltage range: VBAT + 0.3V (3.5V min.)
to 7.2V
Junction operating temperature: -40°C to 125°C
Package: 16-pin PQFN (4mm x 4mm)
Available Support


Evaluation Kit
Support Documentation
ZSPM4551 Application Circuit
ZSPM4551
VIN
VTH_REF
CIN
RREF
GND
VTHERM
VDD
SW
CVDD
RSENSE
LOUT
Battery
COUT
VDD
RPULLUP
(optional)
SCL
VSENSE
SDA
VBAT
RTHM
VDD
EN
NFLT
RPULLUP
(optional)
PGND
* I2C™ is a trademark of NXP.
For more information, contact ZMDI via [email protected]
© 2014 Zentrum Mikroelektronik Dresden AG — Rev. 1.01— October 3, 2014. All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated,
stored, or used without the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.
ZSPM4551
High-Efficiency Charger for Li-Ion Batteries
ZSPM4551 Block Diagram
EN
NFLT
VIN
VIN
VIN
ZSPM4551
SCL
I²C™*
Interface
MONITOR
&
CONTROL
Over-Voltage
Protection
Oscillator
SDA
VBAT
VTH_REF
BATT Thermal
Control
Ramp
Generator
BATT Current
Control
RREF
VTHERM
VBAT
VIN

Vref
Gate
Drive
Backgate
Blocking
Gate Drive
Control
Typical Applications
SW
LOUT
RSENSE
BATTERY
COUT

Portable battery chargers

Smart phones

Laptops

Tablets / e-readers
Comparator
Gate
Drive
Error Amp
Compensation
Network
RTHM
PGND
VIN
Current
Control
VDD Regulator
VSENSE
VBAT
VDD
GND
CVDD
I²C™*is a trademark of NXP.
Ordering Information
Ordering Code
Description
Package
ZSPM4551AA1W
ZSPM4551 High-Efficiency Li-Ion Battery Charger
16-pin PQFN / 7” Reel (1000 parts)
ZSPM4551AA1R
ZSPM4551 High-Efficiency Li-Ion Battery Charger
16-pin PQFN / 13” Reel (3300 parts)
ZSPM4551KIT
ZSPM4551 Evaluation Kit
Sales and Further Information
www.zmdi.com
[email protected]
Zentrum Mikroelektronik
Dresden AG
Global Headquarters
Grenzstrasse 28
01109 Dresden, Germany
ZMD America, Inc.
1525 McCarthy Blvd., #212
Milpitas, CA 95035-7453
USA
Central Office:
Phone +49.351.8822.306
Fax
+49.351.8822.337
USA Phone 1.855.275.9634
Phone +1.408.883.6310
Fax
+1.408.883.6358
European Technical Support
Phone +49.351.8822.7.772
Fax
+49.351.8822.87.772
DISCLAIMER: This information applies to a product under development. Its characteristics and specifications are subject to change without notice.
Zentrum Mikroelektronik Dresden AG (ZMD AG) assumes no obligation regarding future manufacture unless otherwise agreed to in writing. The
information furnished hereby is believed to be true and accurate. However, under no circumstances shall ZMD AG be liable to any customer,
licensee, or any other third party for any special, indirect, incidental, or consequential damages of any kind or nature whatsoever arising out of or
in any way related to the furnishing, performance, or use of this technical data. ZMD AG hereby expressly disclaims any liability of ZMD AG to any
customer, licensee or any other third party, and any such customer, licensee and any other third party hereby waives any liability of ZMD AG for
any damages in connection with or arising out of the furnishing, performance or use of this technical data, whether based on contract, warranty,
tort (including negligence), strict liability, or otherwise.
European Sales (Stuttgart)
Phone +49.711.674517.55
Fax
+49.711.674517.87955
Zentrum Mikroelektronik
Dresden AG, Japan Office
2nd Floor, Shinbashi Tokyu Bldg.
4-21-3, Shinbashi, Minato-ku
Tokyo, 105-0004
Japan
ZMD FAR EAST, Ltd.
3F, No. 51, Sec. 2,
Keelung Road
11052 Taipei
Taiwan
Phone +81.3.6895.7410
Fax
+81.3.6895.7301
Phone +886.2.2377.8189
Fax
+886.2.2377.8199
Zentrum Mikroelektronik
Dresden AG, Korea Office
U-space 1 Building
11th Floor, Unit JA-1102
670 Sampyeong-dong
Bundang-gu, Seongnam-si
Gyeonggi-do, 463-400
Korea
Phone +82.31.950.7679
Fax
+82.504.841.3026
© 2014 Zentrum Mikroelektronik Dresden AG — Rev. 1.01— October 3, 2014.
All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.