ZSPM4551KIT V1.0 ZMDI, ZSPM4551KIT V1.0 Datasheet - Page 12

• Manufacturer Part Number: ZSPM4551KIT V1.0
• Description: Power Management IC Development Tools Li/Ion converter Kit
• Manufacturer: ZMDI
• Type: Battery Managementr

Specifications of ZSPM4551KIT V1.0

• Product Category: Power Management IC Development Tools
• Rohs: yes
• Product: Evaluation Kits
• Tool Is For Evaluation Of: ZSPM4551
• Input Voltage: 3.5 V to 7.2 V
• Output Voltage: 3.94 V to 4.18 V
• Interface Type: I2C
• Output Current: 1.5 A

2
The ZSPM4551 is a fully-integrated Li-Ion battery charger IC based on a highly-efficient switching topology. It is
configurable for termination voltage, charge current, and additional variables to allow optimum charging conditions
for a wide range of Li-Ion batteries. A 1MHz internal switching frequency facilitates low-cost LC filter
combinations. Figure 2.1 provides a block diagram for the ZSPM4551.
Figure 2.1
When the battery voltage is below 3.0 volts, the ZSPM4551 enters a pre-charge state and applies a small,
programmable charge current to safely charge the battery to a level for which full-charge current can be applied.
Once the Full-Charge Mode has been initiated, the regulation will be for constant current (CC). When the battery
voltage has increased enough to go into maintenance mode, the PWM control loop will force a constant voltage
across the battery. Once in constant voltage mode, current is monitored to determine when the battery is fully
charged. See Figure 2.2 for a diagram of the charging states.
Data Sheet
December 4, 2012
ZSPM4551
High-Efficiency Charger for Li-Ion Batteries
Functional Description
Compensation
NFLT
Oscillator
Ramp
Generator
Network
ZSPM4551 Block Diagram
Vref
Error Amp
ZSPM4551
© 2012 Zentrum Mikroelektronik Dresden AG — Rev. 1.00
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.
VDD

Comparator
CONTROL
MONITOR
&
C
VDD
EN
VDD Regulator
VIN
VIN
BATT Thermal
BATT Current
Over-Voltage
VIN
Protection
Gate Drive
Control
Control
GND
Control
VIN
Current
Control
VBAT
VBAT
Gate
Drive
Gate
Drive
Interface
I²C™*
VIN
Backgate
Blocking
SW
PGND
VTH_REF
VTHERM
SCL
SDA
VSENSE
VBAT
L
OUT
I²C™*is a trademark of NXP.
R
SENSE
C
OUT
BATTERY
R
REF
12 of 30
R
THM