XRP6840 Exar Corporation, XRP6840 Datasheet - Page 7

• Manufacturer Part Number: XRP6840
• Description: 4.3a Supercapacitor Flash Led Driver With I2c
• Manufacturer: Exar Corporation

TYPICAL PERFORMANCE CHARACTERISTICS
All data taken at V
Information section of this datasheet.
© 2009 Exar Corporation
Fig. 7: High Efficiency Torch Mode, Input Current versus V
0.6F Supercap, C
Fig. 5: High Efficiency Torch Mode I
Fig. 9: In-rush Current with Li-ion Battery
I
LED
IN
IN
=10µF CH1 = V
at 200mA, no supercap
= 2.7V to 5.5V, T
1100mA
no supercap
IN
, CH4 = I
J
= T
LED
at 200mA
A
VIN
4
4
= 25°C, unless otherwise specified - Schematic and BOM from Application
.
.
=0.5A/div
3
3
A
A
S
S
u
u
IN
7/17
p
p
e
e
Fig. 6: High Efficiency Torch Mode, LED Current versus V
r
r
c
c
Fig. 10: In-rush Current, 0.6F Supercap, C
a
a
p
p
CH2 = V
Fig. 8: VOUT RDY: 0.6F Supercap, CH1 = V
a
a
c
c
i
i
t
t
CH1 = V
o
o
OUT
r
r
, CH3 = RDY, CH4 = I
F
F
l
l
a
a
IN
680mA
, CH4 = I
s
no supercap
s
h
h
L
L
E
E
D
D
VIN
=0.5A/div
D
D
r
r
i
VIN
i
v
v
e
=0.5A/div
e
X
X
r
r
R
R
IN
w
w
= 22µF,
P
P
Rev. 1.0.0
i
i
IN
6
6
t
t
,
h
h
8
8
I
I
4
4
2
IN
2
0
0
C
C