IW1816 Datasheet, PDF (1/18 Pages) Dialog Semiconductor – Off-Line Digital Green-Mode PWM Controller Integrated

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.
Dialog’s 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 330μF to 6,000μF).
2 Features
●● PrimAccurate^TM 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,
12V and above) and capacitve loads up to 6,000μF
●●
No external compensation components required
●● 64kHz PWM switching frequency
●● Built-in single-point fault protections against output
short circuit, output over-voltage, and current-sense-
●● No-load power consumption < 30mW at 230V_AC with
typical application circuit
resistor short-circuit faults
●● Built-in over-temperature protection (OTP)
●● Fast dynamic load response for both one-time and
repetitive load transients
●● No audible noise over entire operating range
●● 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
Datasheet
www.dialog-semiconductor.com
Rev. 1.0
1 of 18
30-Jun-2016
© 2016 Dialog Semiconductor