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參數資料
| 型號： | SMB122 |
| 廠商： | Summit Microelectronics, Inc. |
| 英文描述： | Nine-Channel Programmable DC-DC Power Manager with Battery Charger |
| 中文描述： | 九通道可編程DC - DC電源管理器與電池充電器 |
| 文件頁數： | 1/1頁 |
| 文件大小： | 140K |
| 代理商： | SMB122 |
SMB122
Advanced Specification
1
(See Last Page)
Nine-Channel Programmable DC-DC Power Manager with Battery Charger
SUMMIT
Microelectronics, Inc. 2005
1717 Fox Drive San Jose CA 95131 Phone 408 436-9890 FAX 408 436-9897
http://www.summitmicro.com/
1.2 11/11/2005
1
INTRODUCTION
Digital programming of all major parameters via I
2
C interface
and non-volatile memory
o
Output voltage setpoint/margining
o
Sequencing & digital soft start
o
Enable/Disable outputs independently
o
Input/Output UV/OV voltage thresholds
o
PWM/PFM mode, switching frequency
Eight programmable regulator channels with 1.5% accuracy
o
Three synchronous step-down (buck) with
internal PFETs
o
One configurable step-up (boost) or
synchronous step-down (buck)
o
Two step-up (boost)
o
One configurable step-up (boost) or inverting
step-up/down (buck-boost)
o
One adjustable output voltage LDO
Programmable Linear Li-Ion Battery Charger
o
Precharge/fast charge/termination current
o
Fast Charge voltage threshold
o
Float Voltage (<0.5% accuracy)
+2.7V to +6.0V Input Range (Higher system voltages supported)
Built-in current limiting, UV/OV, and thermal protection
Highly accurate reference and output voltage (<1.5%)
500 to 1000kHz PWM frequency and automatic power-saving
PFM mode
96 bytes of user configurable nonvolatile memory
Applications
Portable Media Players
Digital camcorders/still cameras
Smart PDA/Camera phones
Handheld GPS/PDA’s
TFT-LCD Displays/Monitors/TV’s
The SMB122 is a highly integrated and flexible nine-channel power
manager designed for use in a wide range of portable applications.
The built-in digital programmability allows system designers to custom
tailor the device to suit almost any multi-channel power supply
application from digital camcorders to mobile phones.
The SMB122 integrates all the essential blocks required to implement
a
complete
nine-channel
power
synchronous step-down “buck” converters, one configurable step-up
“boost” or step-down synchronous “buck” converter, two step-up
(boost) converters, one configurable step-up “boost” or inverting step-
up/down “buck-boost” converter, one linear regulator (LDO) and a fully
programmable Li-Ion battery charger. Additionally sophisticated power
control/monitoring functions required by complex systems are built-in.
These include digitally programmable output voltage setpoint, power-
up/down
sequencing,
enable/disable,
input/output monitoring on all channels.
The integration of features and built-in flexibility of the SMB122 allows
the system designer to create a “platform solution” that can be easily
modified via software without major hardware changes. Combined
with the re-programmability of the SMB122 this facilitates rapid design
cycles and proliferation from a base design to futures generations of
product.
The SMB122 is suited to battery-powered applications with an input
range of +2.7V to +6.0V and provides a very accurate voltage
regulation (<1.5%). Communication is via the industry standard I
C
bus. All user-programmed settings are stored in non-volatile EEPROM
of which 96 bytes may be used for general-purpose memory
applications. The commercial operating temperature range is 0C to
+70C, the industrial operating range is –40C to +85C, and the
available package is a 64-pad 9mm x 9mm QFN.
subsystem
including
three
margining
and
UV/OV
S M B 1 2 2
+ 0 .5 V to V in (P ro g .)
L i-Io n B a tte ry
o r
+ 2 .7 V to + 6 .0 V
A n a lo g /R F
+ 1 .5 V to + 3 .7 5 V
M C U /R T C
I
2
C /S M B u s
L D O
3 S te p -
D o w n
C h a n n e ls
S ys te m
C o n tro l
a n d
M o n ito rin g
S ta tu s O u tp u ts
S h u td o w n
+ 0 .5 V to + 3 5 V (P ro g .)
M e m o ry, I/O
+ 0 .5 V to V in (P ro g .)
C P U C o re
+ 0 .5 V to V in (P ro g .)
D S P /C O D E C
S te p -U p o r
S te p -D o w n
C h a n n e l
L i-Io n
C h a rg e r
+ 4 .5 V to + 6 .0 V
D C IN
C o n tro l In p u ts
P u s h b u tto n P o w e r
-3 5 V to + 3 5 V (P ro g .)
T F T -L C D /
C C D S e n s o r
S te p -U p o r
In v e rtin g
C h a n n e l
2 S te p -U p
C h a n n e ls
V in to + 3 5 V (P ro g .)
L E D
B a c k lig h t
V in to + 3 5 V (P ro g .)
T F T -L C D
B ia s
Figure 1 – Applications block diagram featuring the SMB122 eight-channel, programmable DC/DC converter.
This integrated power supply and battery manager provides precision regulation, monitoring, cascade
sequencing, output margining and battery charging.
SIMPLIFIED APPLICATIONS DRAWING
FEATURES & APPLICATIONS
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