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PDF AT1397A Data sheet ( Hoja de datos )
| Número de pieza | AT1397A | |
| Descripción | 6-Channel DC-DC Converter | |
| Fabricantes | Aimtron Technology | |
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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
AT139740 21
41 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: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
1/10/2006 REV:1.0
Email: [email protected]
1
1 page  
AT1397A/B
Preliminary Product Information
6-Channel DC-DC Converter for DSC
Electrical Characteristics
Parameter
Symbol
(PVCC1=PVCC2=PVCC3=PVCC4=VCC=3.6V, Ta=+250C)
Condition
Values
Unit
Min. Typ. Max.
GENERAL
Input Voltage Range
VCC IC Power Input
2.5 - 5.5
V
VCC Under Voltage Lockout VUV
- 2.35 2.4 2.45 V
UVLO Hysteresis
CH1,CH2 Switch- Off Input
Current
CH1,CH2, CH3(or 4,5,6)
Switch- Off Input Current
Shutdown Current
REFERENCE
VHY
-
No Switching,
IIN1
FB1=FB2=0.9V
CTL1=CTL2=3.6V, other
disable
No Switching,
IIN2
FB1=FB2=FB3=0.9V
CTL1=CTL2=CTL3=3.6V,
other disable
ICC
All CTL disable,
VCC=3.6V
-
-
-
-
100 -
1.1 1.2
1.3 1.4
1 10
mV
mA
mA
µA
Reference Output Voltage
VREG IREG =1mA
2.25 2.30 2.35 V
Reference Load Regulation
Reference Line Regulation
∆VREG1 1mA< IREG <5mA
∆VREG2 2.5<VCC<5.5V
- 5 10 mV
- - 5 mV
OSC
Frequency
Frequency variation with
Temperature
Frequency variation with
Input Voltage
CHANNEL 1, 2
fOSC CT=82pF
∆fOSC1 Ta=-20°C ~+85°C
∆fOSC2 VCC =2.5V~5.5V
- 500 -
KHz
- 1 10 %
- 15
%
Input Voltage Range
Normal Operating Soft-Start
Charge Current
FB Regulation Voltage
PVCC1/2
-
ISS1/2 VCC =2.5V~5.5V
VFB1/2 Ta=-20°C ~+85°C
2.5 - 5.5
0.7 1 1.3
0.784 0.8 0.816
V
µA
V
FB input Current
Current-Sense Amplifier
Transresistance
Transconductance
IFB1/2 FB1/2=0.8V
RCS -
GMEA
-
- - 100 nA
- 0.6 -
V/A
- 120 -
µs
Maximum Duty Cycle
DMAX FB1/2=0.7V
- 100 -
%
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
1/10/2006 REV:1.0
Email: [email protected]
5
5 Page 
AT1397A/B
Preliminary Product Information
6-Channel DC-DC Converter for DSC
Typical Application Circuits
LED+
2~4Cell
20mA
VBAT
1-Cell Li-Ion
3.4V~4.2V
MBR140WS
10uH
10uF
PVCC4
150K
1uF
UPM2031AN OUT5
FB5H
10K
LED-
10R
10K
0.1uF
1K
0.22uF
COMP5
FB5
SS5
SEL4
CH5
Voltage-Mode
PWM LED
Driver
VBAT
10uF
PVCC4
1uF PVCC4
CCD Bias
-6V3/50mA
MBR140WS
UPM2032BN OUT4
64.9K
10K
10uF
/6V3
10uH
0.22uF
0.1uF 10K
SS4
COMP4
IN4
IP4
CH4
Voltage-Mode
Inverting PWM
VREG
10K 1uF
0.1uF
AT1397A
10K VBG
1500pF
51K
COMP1
33pF
0.47uF
CSCP
82pF
CT
1500pF
51K
COMP2
33pF
/SDOK
Short-Circuit
Protection
Power ON
LENS ON
CCD ON
LED ON
CTL1
CTL2
CTL3
CTL4
CTL5
CTL6
CH6
Voltage-Mode
Step-Up PWM
PVCC4
10uF
OUT6 UPM2031AN
FB6
10uH
MBR140WS
CCD Bias
+12V/50mA
10uF
140K
COMP6
10K 0.1uF
10K
CH3
Voltage-Mode
Synchronous
Step-Down
CH1
Current-Mode
Synchronous
Step-Down
PWM
CH2
Current-Mode
Synchronous
Step-Down
PWM
SS6
PVCC3
PVCC3
OUT3M
0.1uF
1uF
10uF
UPM2032BN
10uH
VBAT
VLENS
+3V/300mA
OUT3S
22uF
PGND3
FB3
COMP3
SS3
PVCC1
MBR140WS
UPM2031AN
275K
10K 0.1uF
100K
0.1uF
VBAT
LX1
PGND1
FB1
SS1
PVCC2
10uF
VDSP_Core
+1V8/200mA
6.8uH
22uF
MBR140WS 125K
100K
0.1uF
VBAT
LX2
PGND2
FB2
SS2
VCC
GND
10uF
6.8uH
VDSP_IO
+3V3/200mA
22uF
MBR140WS 312.5K
100K
0.1uF
VBAT
1uF
1-Li Battery Application 1
7F, No.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
Fax: 886-3-563-0879
WWW: http://www.aimtron.com.tw
1/10/2006 REV:1.0
Email: [email protected]
11
11 Page | ||
| Páginas | Total 21 Páginas | |
| PDF Descargar | [ Datasheet AT1397A.PDF ] | |
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