SP7686AER-L Exar Corporation, SP7686AER-L Datasheet - Page 7

• Manufacturer Part Number: SP7686AER-L
• Description: LED Drivers Driver in 2x3 DFN
• Manufacturer: Exar Corporation
• Series: -r

Specifications of SP7686AER-L

• High Level Output Current: 500 mA
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Supply Current: 3 mA
• Maximum Power Dissipation: Internally Limited
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: DFN-8
• Minimum Operating Temperature: - 40 C
• Constant Current: Yes
• Constant Voltage: -
• Topology: PWM, Step-Down (Buck), Step-Up (Boost), Switched Capacitor (Charge Pump)
• Number Of Outputs: 1
• Internal Driver: -
• Type - Primary: Flash/Torch, General Purpose
• Type - Secondary: High Brightness LED (HBLED), White LED
• Frequency: 2MHz ~ 2.8MHz
• Voltage - Supply: 2.7 V ~ 5.5 V
• Voltage - Output: -
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

© 2010 Exar Corporation
Fig. 7: SP7686 Startup with 3 CTRL Pulses, V
Fig. 9: SP7686 Turn-off time into SHDN
Fig. 11: SP7686 LED Open, VIN = 4.2V
I
IN
I
I
: 0.5A/div
IN
IN
: 0.5A/div
: 0.5A/div
VFB
V
OUT
VFB
VFB
CTRL
V
CTRL
C
C
OUT
CTRL
o
V
o
OUT
n
n
s
s
t
t
IN
a
a
=4.2V
n
n
t
t
C
C
u
u
7/16
r
r
r
r
e
e
n
n
Fig. 8: SP7686 Startup with 32 CTRL Pulses, V
t
Fig. 10: SP7686 Vout Shorted to GND, VIN = 5.5V
t
100
F
F
90
80
70
60
50
40
30
l
l
2.7
a
a
s
s
h
h
I
IN
Fig. 12: SP7686A Efficiency
D
D
: 0.5A/div
r
r
3
i
i
v
v
I
IN
e
e
: 0.5A/div
r
r
S
S
i
i
3.3
P
P
n
n
VFB
V
7
7
Vin (V)
OUT
CTRL
D
D
6
6
F
F
8
8
N
N
3.6
CTRL
6
6
2
2
VFB
/
/
V
m
m
OUT
Flash 450mA
Torch 150mA
S
S
m
m
P
P
3.9
7
7
IN
Rev. 2.1.0
x
x
=4.2V
6
6
3
3
8
8
m
m
6
6
4.2
m
m
A
A