Power Controller. iW3625 Datasheet

iW3625 Controller. Datasheet pdf. Equivalent

iW3625 Datasheet
Recommendation iW3625 Datasheet
Part iW3625
Description Off-Line Digital Power Controller
Feature iW3625; iW3625 Product Summary Off-Line Digital Power Controller for LED Driver with High Power Factor and .
Manufacture Dialog Semiconductor
Datasheet
Download iW3625 Datasheet




Dialog Semiconductor iW3625
iW3625 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
Supports buck topology for high efficiency (> 90%)
Supports universal input voltage range (90VAC – 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 power inductance tolerance (±20%)
● 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 iW3625 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 buck 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 iW3625 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
iW3625 performance in a tiny SOT-23 package. The iW3625
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
iW3625
Product Summary
Rev. 0.4 Preliminary
1 of 5
© 2014 Dialog Semiconductor (UK) Ltd.



Dialog Semiconductor iW3625
iW3625 Product Summary
Off-Line Digital Power Controller for LED Driver
with High Power Factor and Low-Ripple Current
L
N
iW3625
1 VCC
OUTPUT 6
3 MULTI
CS/PF 4
5 GND
FB/OTP 2
VOUT+
+
VOUT-
Figure 3.1: iW3625 Typical Application Circuit (Non-Isolated Floating Buck Application)
L
N
iW3625
6 OUTPUT
VCC 1
4 CS/PF
MULTI 3
5 GND
FB/OTP 2
NTC
+
+
VOUT +
VOUT
Figure 3.2: iW3625 Typical Application Circuit (Non-Isolated Non-Floating Buck Application)
iW3625
Product Summary
Rev. 0.4 Preliminary
2 of 5
© 2014 Dialog Semiconductor (UK) Ltd.



Dialog Semiconductor iW3625
iW3625 Product Summary
Off-Line Digital Power Controller for LED Driver
with High Power Factor and Low-Ripple Current
4.0 Pinout Description
iW3625
1 VCC
OUTPUT 6
2 FB/OTP
GND 5
3 MULTI
CS/PF 4
Figure 4.1: 6-Lead SOT-23 Package
Pin #
1
2
3
4
5
6
Name
VCC
FB/OTP
MULTI
CS/PF
GND
OUTPUT
Type Pin Description
Power Input Power supply for control logic and MOSFET drive.
Multi-function pin. Used for internal or external OTP current derating
Analog Input configuration at the beginning of start-up and to provide output voltage
sense for regulation during normal operation.
Output
Multi-function pin. Used to control active start-up device and for external
temperature sensing via an NTC resistor.
Multi-function pin. Used for PF configuration at the beginning of start-up
Analog Input and to provide power switch current sense for cycle-by-cycle peak current
control and limit during normal operation.
Ground Ground.
Output Gate drive for external MOSFET switch.
5.0 Absolute Maximum Ratings
Absolute maximum ratings are the parameter values or ranges which can cause permanent damage if exceeded.
Parameter
DC supply voltage range (pin 1, ICC = 20mA max)
Continuous DC supply current at VCC pin (VCC = 15V)
MULTI (pin 3)
OUTPUT (pin 6)
FB/OTP input (pin 2, IFB/OTP ≤ 10mA)
CS/PF input (pin 4)
Maximum junction temperature
Operating junction temperature
Storage temperature
Thermal resistance junction-to-ambient
ESD rating per JEDEC JESD22-A114
Latch-up test per JESD78A
Symbol
VCC
ICC
TJMAX
TJOPT
TSTG
θJA
Value
-0.3 to 18.0
20
-0.3 to 18.0
-0.3 to 18.0
-0.7 to 4.0
-0.3 to 4.0
150
-40 to 150
-65 to 150
190
±2,000
±100
Units
V
mA
V
V
V
V
°C
°C
°C
°C/W
V
mA
iW3625
Rev. 0.4 Preliminary
Product Summary
3 of 5
© 2014 Dialog Semiconductor (UK) Ltd.







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