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Driver IC. CN5730 Datasheet |
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CONSONANCE
Multi-function High Brightness LED Driver IC
CN5730
General Description
The CN5730 is a current regulation integrated circuit
operating from an input voltage of 2.85V to 6V, the
constant output current can be set up to 1.5A with an
external resistor. The CN5730 is ideal to be used to
drive LED. The on-chip power transistor and current
sense block greatly reduce the external component
count.
The chip also integrates the mode selection circuit,
oscillator and state registers, which can control the
LED to operate in one of the following four modes:
Off, High Brightness(HB), Low Brightness(LB) and
Flashing.
The CN5730 adopts the temperature regulation
instead of temperature protection function, the
temperature regulation can make the LED being
turned on continuously in case of high ambient
temperature or high voltage drop.
The other features include the chip enable and button
de-bounce functions.
CN5730 is available in thermally-enhanced 8-pin
small outline package (SOP8).
Applications
Flashlight
High-brightness LED driver
LED headlights
Emergency lights and lighting
Features
Operating Voltage Range: 2.85V to 6V
Four Operating Modes:
Off, HB, LB and Flash
On-chip Power Transistor
Low dropout voltage: 0.4V @ 1.5A
LED pin output current up to 1.5A
Output Current Accuracy: ± 5%
Chip Temperature Regulation
Operating Temperature Range:
-40 ℃ to 85 ℃
Thermally-enhanced 8-pin SOP package
Pb-free, rohs compliant and halogen free
Pin Assignment
MODE 1
8 CE
ISET 2
GND 3
7 BTN
CN5730
6 CT
VDD 4
5 LED
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CONSONANCE
Typical Application Circuit
Figure 1 Typical Application Circuit
(MODE pin is floating，LED works in sequence of Off, HB and LB)
Figure 2 Typical Application Circuit
(MODE pin grounded, LED works in sequence of Off, HB and Flashing)
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CONSONANCE
Figure 3 Typical Application Circuit
(MODE pin is connected to VCC，LED works in sequence of Off, HB, LB and Flashing)
Ordering Information
Part Number Package
CN5730
SOP8
Shipping
Tape and Reel, 4000/Reel
Operating temperature
－40℃ to 85℃
Block Diagram
VCC
CE Schmitt
LED
ISET
-
+
Voltage Ref.
Current Mirror
CT OSC
Register
MODE
BTN
GND
Figure 4 Functional Block Diagram
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