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Dialog Semiconductor - Off-Line Digital Green-Mode Quasi-Resonant PWM Controller

Numéro de référence iW1699
Description Off-Line Digital Green-Mode Quasi-Resonant PWM Controller
Fabricant Dialog Semiconductor 
Logo Dialog Semiconductor 





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iW1699 fiche technique
iW1699
Off-Line Digital Green-Mode
Quasi-Resonant PWM Controller
1 Description
The iW1699 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 operates in quasi-resonant mode to provide high efficiency
and key built-in protection features while minimizing the external component count, simplifying EMI design and
lowering the total bill of material cost. The iW1699 removes the need for a 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 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 iW1699 can achieve both highest
average active efficiency and less than 30mW no-load power consumption, and have fast dynamic load response in
a compact form factor in typical 12W and above applications. The active start-up scheme enables shortest possible
start-up time without sacrificing no-load power loss.
2 Features
No-load power consumption < 30mW at 230VAC along Adaptive multi-mode PWM/PFM control improves
with fast dynamic load response and short turn-on
efficiency
delay time in typical 12W compact adapter/charger
applications
No external loop compensation components required
Tight constant-voltage and constant-current regulation
across line and load range
Complies with EPA 2.0 energy-efficiency specifications
with ample margin
● PrimAccurateTM primary-side feedback eliminates
opto-isolators and simplifies design
Built-in single-point fault protection features: output
short-circuit protection, output over-voltage protection,
over-current protection and current-sense-resistor fault
Proprietary optimized 89kHz maximum PWM switching protection
frequency with quasi-resonant operation achieves
size, efficiency and common mode noise
best
Dedicated pins for external over-temperature
protection and over-voltage protection, with latch
User-configurable 5-level cable drop compensation
function available
provides design flexibility
No audible noise over entire operating range
EZ-EMI® design enhances manufacturability
3 Applications
● Compact AC/DC adapters or chargers for media
tablets and smart phones
● AC/DC adapters for consumer electronics
Product Summary
www.dialog-semiconductor.com
Rev. 1.0
1 of 6
30-Jun-2016
© 2016 Dialog Semiconductor

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