iW1600-03
Off-Line Digital Green-Mode
Quasi-Resonant PWM Controller
1 Description
The iW1600-03 is a high performance AC/DC power supply controller that uses digital control technology to build
peak current mode PWM flyback power supplies. The device directly drives a 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 iW1600-03 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 over all operating conditions. Pulse-by-pulse waveform
analysis allows for a loop response that is much faster than traditional solutions, resulting in improved dynamic load
response. The built-in power limit function optimizes transformer design in universal off-line applications and allows
for a wide input voltage range.
Renesas’ innovative proprietary technology ensures that power supplies built with the iW1600-03 and the secondary-
side voltage positioning controller iW600 can achieve both the highest average active efficiency and less than 10mW
no-load power consumption, and have fast dynamic load response in a compact form factor in typical 5V/2A 10W
applications. The built-in active start-up scheme enables the shortest possible start-up time without sacrificing no-load
power loss.
2 Features
■ Ultra-low no-load power consumption with lowest
system costs (< 10mW at 230VAC in typical 5V/2A
power supplies)
■ User-configurable 4-level cable drop compensation
provides design flexibility
■ EZ-EMITM design enhances manufacturability
■ Fast dynamic response with secondary-side load
■ Adaptive multi-mode PWM/PFM control improves
efficiency
transient detection without optocoupler
■ Built-in fast start-up
■ No external loop compensation components required
■ Direct drive of low-cost BJT power switch achieving
high efficiency
■ Built-in single-point fault protections against output
short-circuit, output over-voltage, and output
over-current
■ Tight constant-voltage and constant-current
regulation across line and load range with
primary-side feedback and control
■ On-chip internal over-temperature protection
■ No audible noise over entire operating range
■ Intelligent low power management achieves ultra-low
operating current at no-load
■ SmartDefender™ smart hiccup technology helps
address issues of soft shorts in cables and connectors
by effectively reducing the average output power at fault
conditions without latch
■ Proprietary optimized line/load adaptive maximum
constant frequency PWM switching with
quasi-resonant operation achieves best size,
efficiency, and common mode noise
3 Applications
■ Compact AC/DC adapters/chargers for media tablets
and smart phones
■ AC/DC adapters for consumer electronics
12-Dec-2022
Product Summary
Rev. 0.1 Preliminary
1 of 6
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© 2022 Renesas Electronics
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