iW1816
Off-Line Digital Green-Mode PWM Controller
Integrated with Power BJT and OTP
1 Description
The iW1816 is a high performance AC/DC power supply control device which uses digital control technology to build
peak current mode PWM flyback power supplies. This device includes an internal power BJT and 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. The iW1816 removes the
need for secondary feedback circuit while achieving excellent line and load regulation. It also eliminates the need for
loop compensation components while maintaining stability in all operating conditions. The pulse-by-pulse waveform
analysis allows for a loop response that is much faster than traditional solutions, resulting in improved dynamic load
response for both one-time and repetitive load transients. The built-in power limit function enables optimized transformer
design in universal off-line applications and allows for a wide input voltage range.
Dialogs innovative proprietary technology ensures that power supplies built with the iW1816 can achieve highest
average efficiency, lowest standby power consumption, and fast smooth startup with a wide range of output voltage (5V,
12V and above) and capacitive loads (from 330F to 6,000F).
2 Features
TM
PrimAccurate primary-side feedback eliminates Quasi-resonant operation for highest overall efficiency
opto-isolators and simplifies design
EZ-EMI design easily meets global EMI standards
Internal 800-V bipolar junction transistor (BJT)
Very tight constant voltage and constant current
Adaptively controlled soft start-up enables fast and regulation with primary-side-only feedback
smooth start-up for a wide range of output voltage (5V,
No external compensation components required
12V and above) and capacitve loads up to 6,000F
Built-in single-point fault protections against output
64kHz PWM switching frequency
short circuit, output over-voltage, and current-sense-
No-load power consumption < 30mW at 230V with resistor short-circuit faults
AC
typical application circuit
Built-in over-temperature protection (OTP)
Fast dynamic load response for both one-time and
No audible noise over entire operating range
repetitive load transients
Adaptive multi-mode PWM/PFM control improves
efficiency
3 Applications
Low-power AC/DC power supply for smart meters,
motor control, home appliances, networking devices
and industrial applications
Linear AC/DC replacement
30-Jun-2016
Datasheet Rev. 1.0
www.dialog-semiconductor.com 1 of 18 2016 Dialog SemiconductoriW1816
Off-Line Digital Green-Mode PWM Controller
Integrated with Power BJT and OTP
L
V
OUT
+
+
GND
N
U1
iW1816
1 C E 8
2 I 7
C
SENSE
V
6
SENSE
GND
4 5
V
CC
Figure 3.1 : iW1816 Typical Application Circuit
WARNING:
The iW1816 is intended for high voltage AC/DC offline applications. Contact with live high voltage offline
circuits or improper use of components may cause lethal or life threatening injuries or property damage. Only
qualified professionals with safety training and proper precaution should operate with high voltage offline
circuits.
iW1816 Output Power Table at Universal Input (85V 264V )
AC AC
1 2
Condition Adapter Open Frame
Output Power (W) 4.0 5.0
Notes:
1. Maximum practical continuous output power measured at enclosure internal ambient temperature of 60C and device emitter pin
(pin 8) temperature of 90C (adapter is placed in a non-ventilated environment).
2. Maximum practical continuous output power measured at open frame ambient temperature of 50C and device emitter pin
(pin 8) temperature of 90C while minimum bulk capacitor voltage is kept above 90V and no special heatsinking is used (test
unit is placed in a non-ventilated environment).
3. The output power can vary depending on the power supply system designs and operating conditions. See Section 10.14 for
more details.
30-Jun-2016
Datasheet Rev. 1.0
www.dialog-semiconductor.com 2 of 18 2016 Dialog Semiconductor