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BOOST CONVERTER. IS31BL3506A Datasheet

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BOOST CONVERTER. IS31BL3506A Datasheet






IS31BL3506A CONVERTER. Datasheet pdf. Equivalent




IS31BL3506A CONVERTER. Datasheet pdf. Equivalent





Part

IS31BL3506A

Description

1.0MHZ BOOST CONVERTER



Feature


IS31BL3506A 1.0MHZ BOOST CONVERTER WITH 35V INTERNAL MOSFET SWITCH July 2012 GE NERAL DESCRIPTION IS31BL3506A is a boos t converter featuring an integrated MOS FET switch designed for driving series strings of LED or other device. Input o perating voltage range is 2.7V~5.5V. Th e device regulates the LED load current is set using an external, low value se nsing resistor. Th.
Manufacture

ISSI

Datasheet
Download IS31BL3506A Datasheet


ISSI IS31BL3506A

IS31BL3506A; e device adjusts the PWM duty cycle of t he switch to maintain the voltage at th e FB pin at a value of 0.3V. The IS31BL 3506A operates at a constant switching frequency of 1.0MHz to allow for small component size. IS31BL3506A features an over voltage shutdown pin which preven ts the output voltage from exceeding 35 V (typ.) in the case of an open circuit condition. The de.


ISSI IS31BL3506A

vice is offered in a tiny TSOT-23-6 and DFN-8 (2mm×2mm) package and a temperat ure rating from -40°C ~ +85°C. FEATUR ES Supply voltage: 2.7V~5.5V Built-i n soft start Drive series strings of -9 LEDs (DFN-8) -8 LEDs (TSOT-23-6) PWM o r DC voltage dimming Frequency of PWM i s 500Hz ~ 500kHz 1.0MHz high speed swit ching frequency 300mV feedback voltage Integrated high power.


ISSI IS31BL3506A

MOSFET Over voltage protection -40°C ~ +85°C working temperature range TSOT- 23-6 and DFN-8 (2mm×2mm) package APPLICATIONS TYPICAL APPLICATIO N CIRCUIT http://www.DataSheet4U.net/ Small LCD Backlights Notebook PC GPS F igure 1 Constant current white LED dri ver using PWM at the EN pin to control intensity Note 1: COUT must be rated f or 50V. Smaller value.

Part

IS31BL3506A

Description

1.0MHZ BOOST CONVERTER



Feature


IS31BL3506A 1.0MHZ BOOST CONVERTER WITH 35V INTERNAL MOSFET SWITCH July 2012 GE NERAL DESCRIPTION IS31BL3506A is a boos t converter featuring an integrated MOS FET switch designed for driving series strings of LED or other device. Input o perating voltage range is 2.7V~5.5V. Th e device regulates the LED load current is set using an external, low value se nsing resistor. Th.
Manufacture

ISSI

Datasheet
Download IS31BL3506A Datasheet




 IS31BL3506A
IS31BL3506A
1.0MHZ BOOST CONVERTER WITH 35V INTERNAL MOSFET SWITCH
January 2014
GENERAL DESCRIPTION
IS31BL3506A is a boost converter featuring an
integrated MOSFET switch designed for driving series
strings of LED or other device. Input operating voltage
range is 2.7V~5.5V. The device regulates the LED load
current is set using an external, low value sensing
resistor. The device adjusts the PWM duty cycle of the
switch to maintain the voltage at the FB pin at a value
of 0.3V. The IS31BL3506A operates at a constant
switching frequency of 1.0MHz to allow for small
component size. IS31BL3506A features an over
voltage shutdown pin which prevents the output
voltage from exceeding 35V (typ.) in the case of an
open circuit condition. The device is offered in a tiny
TSOT-23-6, SOT-23-6 and DFN-8 (2mm×2mm)
package and a temperature rating from -40°C ~ +85°C.
FEATURES
Supply voltage: 2.7V~5.5V
Built-in soft start
Drive series strings of
-9 LEDs (DFN-8)
-8 LEDs (TSOT-23-6, SOT-23-6)
PWM or DC voltage dimming
Frequency of PWM is 500Hz ~ 500kHz
1.0MHz high speed switching frequency
300mV feedback voltage
Integrated high power MOSFET
Over voltage protection
-40°C ~ +85°C working temperature range
TSOT-23-6, SOT-23-6 and DFN-8 (2mm×2mm)
package
APPLICATIONS
Small LCD Backlights
Notebook PC
GPS
TYPICAL APPLICATION CIRCUIT
Figure 1 Constant current white LED driver using PWM at the EN pin to control intensity
Note 1: COUT must be rated for 50V. Smaller values of output capacitance will cause the LED current ripple to increase.
Note 2: The resistor REST should be placed as close as possible to the FB pin to prevent the EMI.
Note 3: Because of the different packages, VOVP is not the same (Page 6). 9 LEDs can be driven by DFN-8 package and 8 LEDs can be driven
by TSOT-23-6 and SOT-23-6 package most.
Note 4: The high level of PWM signal for EN pin should last at least 200ns when power on, or the IC won’t start up.
Integrated Silicon Solution, Inc. – www.issi.com
Rev. C, 01/09/2014
1




 IS31BL3506A
IS31BL3506A
VBattery
2.7~5.5V
L1
10 H
 
D1
2.2 F
0.1 F
PWM Signal
Micro
Controller
VCC
LX
OUT
EN IS31BL3506A
COUT
1F
(50V)
(4~8)×2
LEDs
100k
GND
FB
RSET
7.5
Figure 2 Constant current white LED driver using PWM at the EN pin to control intensity (4~8)×2 LEDs 
 
VBattery
2.7~5.5V
L1
10 H
D1
VOUT =VFB× (R1 +RSET)/RSET
2.2 F
0.1 F
Micro
Controller
100k
VCC
LX
OUT
IS31BL3506A
EN
FB
GND
COUT
1F
(50V)
R1 Load
RSET
Figure 3 Constant output voltage for general purpose use
Figure 4 Constant output current with DC dimming input
Integrated Silicon Solution, Inc. – www.issi.com
Rev. C, 01/09/2014
2




 IS31BL3506A
IS31BL3506A
Figure 5 Constant output current with PWM dimming control
Integrated Silicon Solution, Inc. – www.issi.com
Rev. C, 01/09/2014
3



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