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Preliminary Specification describes products that are not in full production at the time of printing. Specifications are based on design goals and
limited characterization. They may change without notice. Contact Fairchild Semiconductor for current information.
P
www.fairchildsemi.com
SMBus is a trademark of Intel Corporation
Rev. 0.8.2
Features
¥ Chemistry independent charging
¥ SMBus
2-wire serial interface controlled
¥ Independent Voltage, Current and Power DACs
¥ 6A maximum charging current
¥ 4D19V battery voltage range
¥ 24V maximum input voltage
¥ 5V òkeep aliveó regulator controller onboard
¥ 100% maximum duty-cycle
¥ Synchronous rectiTcation
¥ System soft start protects during hot plug-ins
¥ Latched current limit protection
¥ Output over-voltage protection (crowbar)
¥ Input under-voltage lockout
¥ Battery backfeed prevented
¥ Optimized response for each control loop (current,
voltage and power)
¥ Power down driven by SMBus or by adapter not available
or by softstart pin
¥ Controlled drive of discrete FETs minimizes power
dissipation
¥ Logic signal ACAV indicates presence of AC adapter
(adjustable threshold)
¥ Output current òmotorboatingó prevented
¥ True power multiplier
a
Applications
¥ Notebooks fast chargers
¥ PDAs
¥ Hand-held portable instruments
Description
The FAN5201 is a smart battery charger IC controller for
Li+ and Ni based battery chemistries. The charger (slave)
together with the host controller and smart battery constitutes
a smart battery system that communicates via the SMBus
protocol, a two wire serial communication system.
An innovative power control loop allows operation from line
power and battery charging (with residual power) without
exceeding the maximum input power programmed according
to the AC adapter power rating.
The FAN5201 is available in one SSOP24 package.
Block Diagram
D
S
P
P
I
H
L
D
I
B
V
P
A
D
Vth
ACAV
CompP
CompV
CompI
SS
PGND
SGND
IthINISO
IthILIM
- +
I
P
23
22
SDA
SCL
SMBUS
X
VTRIANG
14
15
16 17
18
13
11
9
2
4
3
10
8
7
19
12
24
1
21
5
6
20
+ -
-+
V
+-
+-
FAN5201
Chemistry Independent Intelligent Battery Charger