AT1397A Datasheet, PDF (1/21 Pages) Aimtron Technology – 6-Channel DC-DC Converter for DSC

AT1397A/B
Preliminary Product Information
6-Channel DC-DC Converter for DSC
Features
• 95% Efficient possible DC/DC Converter
• Bulit-in LED Driver and Open LED
Overvoltage Protection
• Transformerless Inverting Controller for CCD
Bias
• 2 Channel Built-in MOSFET Current- Mode
PWM and 4 Channel Extra PWM Controllers
(CH-3 Synchronous Output)
• Up to 1MHz Operating Frequency
• Shutdown Current <1uA
• Built-in Soft-Start Function
Built-in Short-Circuit Protection Function
• QFN48 Package
General Description
The AT1397A/B provide a complete power
supply solution for digital cameras. They improve
performance, component count, and size compared
to other multi-channel controllers in 1-cell Li-Ion
designs. On-chip MOSFETs provide up to 92~95%
efficiency for critical power supplies, while
additional channels operate with external FETs for
optimum design flexibility. All channels DC/DC
operate at one fixed frequency settable from
100KHz to 1MHz to optimize size, cost, and
efficiency.
Applications
• DSC Power Supply
Pin Assignment
36 35 34 33 32 31 30 29 28 27 26 25
37
24
38
23
39
22
40
21
41
AT1397 ²⁰
42
19
43
18
44
17
45
16
46
15
47
14
48
13
1 2 3 4 5 6 7 8 9 10 11 12
AT1397AN
CH1
Synchronous Rectified
Current Mode Step-Down
On-Chip MOSFET
CH2
Synchronous Rectified
Current Mode Step-Down
On-Chip MOSFET
CH3
Synchronous Rectified
Voltage Mode Step-Down
CH4
Seletable Voltage Mode
Step-Up/Down/Inverting
CH5
Voltage Mode PWM
LED Driver
CH6
Voltage Mode Step-Up
AT1397BN
CH1
Synchronous Rectified
Current Mode Step-Down
On-Chip MOSFET
CH2
Synchronous Rectified
Current Mode Step-Down
On-Chip MOSFET
CH3
Synchronous Rectified
Voltage Mode Step-Down
CH4
Seletable Voltage Mode
Step-Up/Down/Inverting
CH5
Voltage Mode PWM
Step-Up
CH6
Voltage Mode Step-Up
Ordering Information
Part Number
Package
AT1397 N
QFN48,Green
： A:1397AN B:1397BN
： Date Code
*For more marking information, contact our sales representative directly.
Marking
Aimtron reserves the right without notice to change this circuitry and specifications.
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: [phone] Fax: [phone]
WWW: http://www.aimtron.com.tw
1/10/2006 REV:1.0
Email: [e-mail]
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