Agamem Microelectronics Inc.
PRELIMINARY
■ELECTRICAL
CHARACTERISTICS
AA1700
Constant Current White LED driver
(V
CC
= +2 V, Ta = +25 C)
。
Parameter
Circuit to prevent
malfunction at low
input voltage
(U.V.L.O.)
Soft start
Short circuit
detection (S.C.P.)
Reset voltage
Threshold voltage
Charging current
Voltage at soft start
completion
Charging current
Threshold voltage
Oscillation
frequency
Frequency input
stability
Frequency variation
with temperature
Input threshold
voltage
V
T
input stability
V
T
variation with
temperature
Input bias current
Voltage gain
Frequency
bandwidth
Error amplifier
Maximum output
voltage range
Output source
current
Output sink current
Idle period
adjustment
section
Maximum duty cycle
Symbol
V
R
V
TH
I
CS
V
tS
I
CPC
V
tPC
f
CLK
f
dV
f
dT
V
T
V
TdV
V
TdT
I
B
A
V
BW
V
OM+
V
OM –
I
OM+
I
OM –
t
DUTY
Condition
Min
—
—
V
SP
= 0 V
—
V
SP
= 0 V
—
R
T
= 3.0 kΩ , C
T
= 270 pF
V
CC
= 2 V to 15 V
Ta = –30°C to +85°C
V
ER
= 450 mV
V
CC
= 2 V to 15 V
Ta = –30°C to +85°C
V
IN
= 0 V
—
A
V
= 0 dB
—
1.1
–1.5
0.7
–1.5
0.7
400
—
—
480
—
—
–1.0
70
—
0.78
—
V
ER
= 0.45 V
R
T
= 3.0 kΩ , C
T
= 270 pF
V
ER
= 0.8 V
—
24
65
Value
Typ
—
1.3
–1.0
0.8
–1.0
0.8
500
2
5
500
5
1
–0.2
100
6
0.87
0.05
–40
40
75
Max
0.9
1.5
–0.7
0.9
–0.7
0.9
600
10
—
520
20
—
1.0
145
—
—
0.2
–24
—
85
Unit
V
V
µ
A
V
µ
A
V
kHz
%
%
mV
mV
%
µ
A
V/V
MHz
V
V
µ
A
µ
A
%
Sawtooth wave
oscillator (CLK)
©Copyright
Agamem Microelectronics Inc.
4
www.agamem.com.tw
2007/1/22
AGAMEM [ AGAMEM MICROELECTRONIC INC. ]
