Power Controller. iW3628 Datasheet

iW3628 Controller. Datasheet pdf. Equivalent

iW3628 Datasheet
Recommendation iW3628 Datasheet
Part iW3628
Description Off-Line Digital Power Controller
Feature iW3628; iW3628 Product Summary Off-Line Digital Power Controller for LED Driver with High Power Factor and .
Manufacture Dialog Semiconductor
Datasheet
Download iW3628 Datasheet




Dialog Semiconductor iW3628
iW3628 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 20W
● High power factor (PF) with low current-ripple control
technology
User-configurable power factor setting (>0.7 to >0.9)
User-configurable over-temperature protection (OTP)
with temperature-current derating
● Very tight LED current regulation (±5%) across line and
load, and within primary inductance tolerance (±20%)
● Isolated design without opto-coupler
● Supports wide range of LED numbers with tight current
regulation
● Stabilized LED current-ripple control without visible
shimmer or flicker
● Active start-up scheme enables fastest possible start-up
72kHz maximum PWM switching frequency with quasi-
resonant operation
Dynamic base current control to drive low-cost BJT
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 iW3628 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 hybrid mode control in PWM flyback power
supplies to achieve high power factor meanwhile minimizing
LED current ripple. This distinctive control approach enables
the capability for users to make trade-offs between 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. The iW3628 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. The built-in power limit
function enables optimized transformer design in universal
off-line applications with input voltage from 90VAC to 277VAC.
Dialog’s innovative proprietary technology maximizes the iW3628
performance in a thermal-enhanced SOIC-8 package. The
iW3628 offers two multi-function pins allowing users to
configure PF and OTP as required with no cost or size
impact, thereby providing design flexibility. The active start-
up scheme enables the shortest possible start-up time
without sacrificing active efficiency.
3.0 Applications
● Solid-state LED lighting
L ● LED lighting ballast
VOUT-
N+
VOUT+
iW3628
Product Summary
U1
iW3628
4 OUTPUT VCC 8
5 CS/PF ASU 7
1 GND FB/OTP 6
2 GND
GND 3
+
Figure 3.1: iW3628 Typical Application Circuit (Non-Isolated Application)
Rev. 1.1
1 of 5
© 2014 Dialog Semiconductor (UK) Ltd.



Dialog Semiconductor iW3628
iW3628 Product Summary
Off-Line Digital Power Controller for LED Driver
with High Power Factor and Low-Ripple Current
L
N
U1
iW3628
4 OUTPUT VCC 8
5 CS/PF ASU 7
1 GND FB/OTP 6
2 GND
GND 3
+
VOUT
+
GND
Figure 3.2: iW3628 Typical Application Circuit (Isolated Application)
L
N
U1
iW3628
4 OUTPUT VCC 8
5 CS/PF ASU 7
1 GND FB/OTP 6
2 GND
GND 3
+
VOUT
+
GND
Figure 3.3: iW3628 Typical Application Circuit (Isolated Application without Using Active Start-Up Device )
iW3628
Product Summary
Rev. 1.1
2 of 5
© 2014 Dialog Semiconductor (UK) Ltd.



Dialog Semiconductor iW3628
iW3628 Product Summary
Off-Line Digital Power Controller for LED Driver
with High Power Factor and Low-Ripple Current
4.0 Pinout Description
iW3628
1 GND
VCC 8
2 GND
ASU 7
3 GND
FB/OTP 6
Pin #
1
2
3
4
5
6
7
8
Name
GND
GND
GND
OUTPUT
CS/PF
FB/OTP
ASU
VCC
4 OUTPUT
CS/PF 5
Figure 4.1: 8-Lead SOIC-8 Package
Type Pin Description
Ground Ground.
Ground Ground.
Ground Ground.
Output Base drive for BJT.
Multi-function pin. Used for PF configuration at the beginning of start-
Analog Input up and to provide primary current sense for cycle-by-cycle peak current
control and limit during normal operation.
Multi-function pin. Used for OTP current derating configuration at the
Analog Input beginning of start-up and to provide auxiliary voltage sense for primary
regulation during normal operation.
Output Control signal for active start-up device (BJT or depletion mode NFET).
Power Input Power supply for control logic and BJT drive.
5.0 Absolute Maximum Ratings
Absolute maximum ratings are the parameter values or ranges which can cause permanent damage if exceeded.
Parameter
Symbol
Value
Units
DC supply voltage range (pin 8, ICC = 20mA max)
VCC -0.3 to 18.0 V
Continuous DC supply current at VCC pin (VCC = 15V)
ICC 20 mA
ASU output (pin 7)
-0.3 to 18.0
V
OUTPUT (pin 4)
-0.3 to 4.0
V
FB/OTP input (pin 6, IFB/OTP ≤ 10mA)
CS/PF input (pin 5)
-0.7 to 4.0
-0.3 to 4.0
V
V
Maximum junction temperature
Operating junction temperature
Storage temperature
Thermal resistance junction-to-ambient
ESD rating per JEDEC JESD22-A114
TJMAX
TJOPT
TSTG
θJA
150
-40 to 150
-65 to 150
155
±2,000
°C
°C
°C
°C/W
V
Latch-up test per JESD78A
±100
mA
iW3628
Rev. 1.1
Product Summary
3 of 5
© 2014 Dialog Semiconductor (UK) Ltd.







@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site (Privacy Policy & Contact)