XRP7604 Exar Corporation, XRP7604 Datasheet - Page 6

• Manufacturer Part Number: XRP7604
• Description: 1a 29v Non-sync. Buck High Power Led Driver
• Manufacturer: Exar Corporation

© 2009 Exar Corporation
Fig. 8: No Cout, Output Ripple=284mVpp, Vin=29V
Fig. 6: Feedback Voltage vs Input Voltage
0.210
0.205
0.200
0.195
0.190
5
1 LED, Vf=3.3V @ 0.75A
1 LED, Vf=3.3V @ 0.75A
Fig. 10: 5V Vin Startup
VFB versus Vin at Iout = 750mA
10
15
1 LED
Vin(V)
20
2 LED
25
1
1
Ch1: Lx
Ch2: Vout(AC)
Ch4: Io 0.75A/div
Ch1: Vin
Ch2: Vout
Ch3: VFB
Ch4: Io 0.5A/div
A
A
2
2
30
9
9
V
V
N
N
6/13
o
o
n
n
-
-
Fig. 9: Cout=1uF, Output Ripple=164mVpp, Vin=29V
S
S
Fig. 7: No Cout, Output Ripple=104mVpp, Vin=6V
y
y
n
n
c
c
.
.
B
B
u
u
1 LED, Vf=3.3V @ 0.75A
1 LED, Vf=3.3V @ 0.75A
1 LED, Vf=3.3V @ 0.75A
Fig. 11: 12V Vin Startup
c
c
k
k
H
H
i
i
g
g
h
h
P
P
o
o
w
w
e
e
r
r
X
L
X
L
E
E
Ch1: Lx
Ch2: Vout(AC)
Ch4: Io 0.75A/div
Ch1: Lx
Ch2: Vout(AC)
Ch4: Io 0.75A/div
Ch1: Vin
Ch2: Vout
Ch3: VFB
Ch4: Io 0.5A/div
R
R
D
D
P
P
Rev. 1.0.0
D
D
7
7
r
r
6
6
i
i
v
v
0
0
e
e
4
4
r
r