SC600BIMLTR Semtech, SC600BIMLTR Datasheet - Page 9
![IC, LED DRIVER, CHARGE PUMP, MLPD-10](/photos/19/2/190239/4551591_sml.jpg)
SC600BIMLTR
Manufacturer Part Number
SC600BIMLTR
Description
IC, LED DRIVER, CHARGE PUMP, MLPD-10
Manufacturer
Semtech
Datasheet
1.SC600BIMLTRT.pdf
(19 pages)
Specifications of SC600BIMLTR
Led Driver Application
LED Backlighting, Portable Electronics
No. Of Outputs
1
Output Current
120mA
Output Voltage
4.725V
Input Voltage
2.5V To 6.5V
Topology
Charge Pump
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
SC600BIMLTR
Manufacturer:
Freescale
Quantity:
1
Company:
Part Number:
SC600BIMLTRT
Manufacturer:
ADDTEK
Quantity:
1 308
Brightness Control with PWM Input
Brightness control using a PWM input can be achieved
with the application circuit below. Note that by connecting
CX8 to the PWM signal the switching frequency is changed
as the PWM signal changes. The charge pump operates
at 262kHz during the on-time when there is a demand for
POWER MANAGEMENT
Applications Information (Cont.)
© 2006 Semtech Corp.
500
450
400
350
300
250
200
150
100
50
0
2.8
3.3
Ripple Voltage vs. Input Voltage
3.8
2 .7V to 6. 5V
Input Voltage [V]
PW M
C in
1 uF
4.3
White LED Driver Circuit with PWM Brightness Control
4.8
Voltage Waveforms for LED Driver Circuit
3
4
6
5
VI N
C D4
C X8
EN
5.3
GN D
U1
8
C F1 +
C F1 -
C F2 -
VOUT
C F2 +
5.8
Vout p-p
Vin p-p
1 0
9
7
1
2
9
C buck et1
1 uF
C buck et2
1 uF
current, and then changes to 32kHz when there is no load
current. This is done to save battery power by taking ad-
vantage of the lower 280μA quiescent current at 32kHz.
The ripple voltage seen at the output is reasonable for
LED applications, but the output capacitance can be in-
creased to reduce the ripple if required. The sum of the
LED currents for this circuit is 55mA during the on-time.
120
100
80
60
40
20
0
2. 8
5.0 V
Cout
1uF
3
10 0
Battery Current vs. Input Voltage
10 0
3. 2
for Various Duty Cycles
Input Voltage [V]
10 0
3. 4
3. 6
www.semtech.com
SC600
3. 8
89.20%
70.30%
50.20%
30.20%
4