ETC AT1453

AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
Features
General Description
• 2.5 to 5.5V supply voltage operating range.
• Low current consumption: 1mA in operation,
• 50 kHz or 100kHz operation frequency .
• Built-in maximum duty control.
• push-pull output.
• Built-in soft start circuit.
• Built-in auto-discharge function.
The AT1453 is a charger control IC for Photoflash
capacitor with soft start function, adjustable
maximum duty cycle and auto-discharge circuit.
Adjustable soft start is programmed with an
external capacitor on SS pin. It is ideal for DSC
flash unit.
Applications
•Digital Still Cameras flash unit
Block Diagram
VCC
GND
Reference
Vref
1.1V
READY
Output
Control
Block
OUT
SS
DUTY
CHARGE
Enable
Block
FB
Aimtron reserves the right without notice to change this circuitry and specifications.
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
1
AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
Pin Configuration
Ordering Information
Part number
AT1453A
Package
8-pin Plastic SOP
8-pin Plastic TSSOP
8-pin Plastic SOP
8-pin Plastic TSSOP
AT1453B
Remarks
AT1453AS
AT1453AP
AT1453BS
AT1453BP
A:50kHz B:100kHz
Pin Description
Pin No.
Symbol
I/O
1
2
3
4
5
6
7
8
CHARGE
FB
DUTY
GND
OUT
VCC
READY
SS
I
I
I
O
O
I
Description
Charge enable input
Error amplifier input
Duty control input
Ground
Push-pull output
Power supply
Charge ready open drain output
Soft-start setting
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
2
AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
Absolute Maximum Ratings
Parameter
Power Supply Voltage
Source Average Current of OUT
Sink Average Current of OUT
Input Voltage to Error Amplifier
Continuous power dissipation
Operating temperature
Junction temperature
Storage temperature
Lead temperature
Condition
—
—
—
—
TSSOP8(Ta=+25℃)
SOP8(Ta=+25℃)
—
—
—
—
Rated Value
Min.
Max.
+7
-50
50
6.5
450
500
-30
+85
+125
-40
+150
+300
Unit
V
mA
mA
V
mW
mW
0
C
0
C
0
C
0
C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are
stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the
operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended
periods may affect device reliability.
Recommended Operating Conditions
(Ta=+250C)
Parameter
Power supply voltage
Operating temperature
Symbol
VCC
TOP
Values
Min.
2.5
-30
Typ.
-+25
Unit
Max.
5.5
+85
V
°C
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
3
AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
Electrical Characteristics
(VCC = 3.3V,Ta =+25℃, unless otherwise noted.)
Parameter
Symbol
Condition
Values
Unit
Min. Typ. Max.
Entire device
Input Supply Range
VCC
Feedback Voltage
VFB
Feedback Voltage
line-regulation
VFB-Line
2.5
5.5
V
1.089 1.1 1.111
VCC=2.5V to 5.5V
V
-
1
5
mV
-
0.5
5
%
CHRGE=GND
-
-
400
μA
Duty=50%,
fOSC=50KHz
-
1.0
-
mA
A
40
50
60
kHZ
B
90
100
110
kHZ
-
0.3
-
V
Ta =-30℃ to +85℃
Feedback Variation
with Temperature
--
Standby current
ICCS
Operating Current
ICC
Frequency
fosc
Threshold voltage of SS
VSS_0
Soft-Start and Duty Threshold voltage of SS
Section
Charging current
Maximum duty cycle
VSS 100
ISS
TDUTY
Duty Cycle=100%
VSS=0V
--
1.1
1.0
--
90
V
μA
%
ISOURCE
ISINK
ROH
ROL
Duty≧95%, OUT=0V
Duty≦5%, OUT=5V
OUT = -15mA
OUT = 15mA
65
-
-130
100
18
16
-80
30
25
mA
mA
Ω
Ω
0.8
V
V
Oscillator
Output Section
Charge ON/OFF
Section
Output source current
Output sink current
Output ON resistor
Output OFF resistor
Active mode Threshold
Disable mode Threshold
VONH
VONL
Duty Cycle=0%
2.0
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
4
AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
Timing Chart
AT1453 Charge Toggling Refresh Mode
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
5
AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
DUTY Setting
The DUTY resistor selection depends on Duty Cycle , choose the component using the following
equation:
V DUTY (V ) = 0.3 +
RDUTY ( KΩ) =
DUTY
1.15
15
1.1
(
) − 1.073
VDUTY
example:
Set duty cycle is 50%
V DUTY = 0.3 +
R DUTY =
0.5
= 0.734
1.15
15
1.1
) − 1.073
(
0.734
≈ 35.2 KΩ
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
6
AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
Typical Application Schematic
(A) IGBT Trigger
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
7
AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
(B)SCR Trigger
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
8
AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
(C)
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
9
AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
CH1:READY CH2: CHARGE CH3:IBAT CH4:VOUT(290V)
Fig1. VCC=3.0V VBAT=3.0V
Fig2. VCC=3.0V VBAT=2.5V
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
10
AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
Fig3. VCC=3.0V VBAT=2.0V
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
11
AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
Small Outline 8-pin Plastic SOL
SYMBOL
A
B
C
D
E
F
H
J
K
M
L
e1
α
INCHES
MIN
MAX
0.188
0.197
0.149
0.158
0.228
0.244
0.050
BSC
0.013
0.020
0.004
0.010
0.053
0.069
0.011
0.019
0.007
0.010
0.016
0.050
0.150 REF
450
0
80
0
MILLIMETERS
MIN
MAX
4.80
5.00
3.80
4.00
5.80
6.20
1.27 BSC
0.33
0.51
0.10
0.25
1.35
1.75
0.28
0.48
0.19
0.25
0.40
1.27
3.81 REF
450
0
0
80
NOTES
-
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
12
AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
Small Outline 8-pin TSSOP
SYMBOL
A
B
C
D
E
F
H
K
M
α
INCHES
MIN
MAX
0.114
0.122
0.169
0.177
0.244
0.260
0.026
BSC
0.010
0.012
0.002
0.006
0.041
0.047
0.005
BSC
0.020
0.028
80
00
MILLIMETERS
MIN
MAX
2.90
3.10
4.30
4.50
6.20
6.60
0.65 BSC
0.25
0.30
0.05
0.15
1.05
1.20
0.127 BSC
0.50
0.70
00
80
NOTES
-
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
13
AT1453
Preliminary Product Information
Photoflash Capacitor Charger for DSC
Reflow Condition (IR/Convection or VPR Reflow)
Reference JEDEC Standard J-STD-020A
Classification Reflow Profiles
Convection or
IR/Convction
Average Heating Rate(180°C to peak)
5°C/second max.
120 seconds max.
Preheat Temperature(125±20°C)
10~150 seconds
Temperature maintained above 180°C
Time within 5°C of actual Peak 10~20 seconds
Temperature
Peak Temperature Range(Note 1)
219~225°C or
235~240°C
Cooling Rate
6°C /second max.
6 minutes max.
Time 25°C to Peak Temperature
VPR
10°C/second max.
60 seconds
219~225°C or
235~240°C
10°C/second max.
*1 The maximum peak temperatures for IR and VP reflow are depending on package dimensions.
Package Reflow Conditions
Pkg. Thickness ≥2.5mm Pkg. Thickness <2.5mm Pkg. Thickness <2.5mm
and
and
and all bags
Pkg. Volume ≥350 mm3 Pkg. Volume <350 mm3
Convection 219~225°C
VPR 219~225°C
IR/Convection 219~225°C
Convection 235~240°C
VPR 235~240°C
IR/Convection 235~240°C
2F, No.10, Prosperity RD. II, Science-Based Industrial Park, Hsinchu 300,Taiwan, R.O.C.
Tel: 886-3-563-0878
WWW: http://www.aimtron.com.tw
Fax: 886-3-563-0879
Email: service@aimtron.com.tw
14