Power Controller. iW3622 Datasheet

iW3622 Controller. Datasheet pdf. Equivalent

iW3622 Datasheet
Recommendation iW3622 Datasheet
Part iW3622
Description Off-Line Digital Power Controller
Feature iW3622; iW3622 Product Summary Off-Line Digital Power Controller for LED Driver with High Power Factor and .
Manufacture Dialog Semiconductor
Datasheet
Download iW3622 Datasheet




Dialog Semiconductor iW3622
iW3622 Product Summary
Off-Line Digital Power Controller for LED Driver
with High Power Factor and Low-Ripple Current
1.0 Features
2.0 Description
● All-in-one non-dimmable low-cost off-line LED driver
(isolated and non-isolated applications)
● Supports universal input voltage range (90VAC to 277VAC)
and output power up to 45W
● High power factor (PF) with low current-ripple control
technology
User-configurable power factor setting (> 0.7 to > 0.95)
● Able to achieve low THD (< 20%)
User-configurable internal or external over-temperature
protection (OTP) with temperature-current derating
● Tight LED current regulation (±5%) across line and load,
and within primary inductance tolerance (±20%)
● Isolated design without opto-coupler
● Stabilized LED current-ripple control without visible
shimmer or flicker
● Active start-up scheme enables fastest possible start-up
72kHz nominal PWM switching frequency with quasi-
resonant operation
EZ-EMI® design enhances manufacturability
● Built-in single-point fault protection features: LED open-/
short-circuit protection and over-current protection
● No audible noise over entire operating range
The iW3622 is a high performance, single-stage AC/DC
power controller for LED luminaires with power factor (PF)
correction. The device uses digital control technology to
build unique control in PWM flyback/buck-boost power
supplies to achieve high power factor while minimizing the
LED current ripple. This distinctive control approach enables
the capability for users to make trade-offs between the
PF and LED current ripple in a single-stage design. It can
achieve excellent LED current regulation over line and load
variation, without the need for secondary feedback circuit.
The built-in temperature sensor along with control logic
can automatically adjust output current in real-time without
visible flicker during the process. Alternatively, the external
NTC thermistor is placed close to the hot spots in a design to
provide thermal protection in the similar pattern by derating
LED current. The iW3622 operates in quasi-resonant
mode to provide high efficiency along with a number of key
built-in protection features while minimizing the external
component count, simplifying EMI design, and lowering the
total bill of material cost. It also eliminates the need for loop
compensation components while maintaining stability over
all operating conditions.
Dialog’s innovative proprietary technology maximizes the
iW3622 performance in a tiny SOT-23 package. The iW3622
offers two multi-function pins allowing users to configure PF
and LED current derating as required with no cost or size
impact, thereby providing design flexibility. In addition to
providing the temperature sensing via an NTC resistor, the
MULTI pin also enables active start-up scheme to achieve
the shortest possible start-up time without sacrificing active
efficiency.
3.0 Applications
● Solid-state LED lighting
● LED lighting ballast
iW3622
Product Summary
Rev. 0.8 Preliminary
1 of 6
© 2014 Dialog Semiconductor (UK) Ltd.



Dialog Semiconductor iW3622
iW3622 Product Summary
Off-Line Digital Power Controller for LED Driver
with High Power Factor and Low-Ripple Current
L
VOUT-
N
+
VOUT+
iW3622
1 VCC
OUTPUT 6
3 MULTI
CS/PF 4
5 GND
FB/OTP 2
Figure 3.1: iW3622 Typical Application Circuit (Non-Isolated Buck-Boost Application)
L
N
iW3622
6 OUTPUT
VCC 1
4 CS/PF
MULTI 3
5 GND
FB/OTP 2
NTC
+
VOUT +
+
VOUT
Figure 3.2: iW3622 Typical Application Circuit (Isolated Flyback Application Using Active Start-up Device)
iW3622
Product Summary
Rev. 0.8 Preliminary
2 of 6
© 2014 Dialog Semiconductor (UK) Ltd.



Dialog Semiconductor iW3622
iW3622 Product Summary
Off-Line Digital Power Controller for LED Driver
with High Power Factor and Low-Ripple Current
L
N
iW3622
6 OUTPUT
VCC 1
4 CS/PF
MULTI 3
5 GND
FB/OTP 2
+
VOUT +
+
VOUT
Figure 3.3: iW3622 Typical Application Circuit (Isolated Flyback Application without Using Active Start-up Device)
iW3622
Product Summary
Rev. 0.8 Preliminary
3 of 6
© 2014 Dialog Semiconductor (UK) Ltd.







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