EVPS001 - IXYS - Datasheet.Directory

NEW APPLICATION TOOL BRIEF

August 2006

OPTIMIZED FOR VERY LOW STANDBY POWER HICCUP MODE LINE-SIDE OUTPUT POWER LIMITING

WWW.IXYS.COMWWW.IN-PLUG.COM

Design Kit and Evaluation System:

5W to 10W Ultra-Green Power Supply

DESIGN KIT / EVALUATION SYSTEM – APPLICATION TOOL BRIEF

IN-PLUG® Series. Gateway To Low Cost, High Efficiency SMPS Integration.

Featured Component Description

• Less than 100mW of board standby power

• Low startup current < 70µA

• Operational current consumption as low as 350µA

• Only 150mW when output shorted

• Line and load overvoltage protections

• Built-in overload/short-circuit protection

• Adjustable frequency

• Cycle skipping for very low board standby power

System Features

IPS18 – Ultra-Green Flyback Controller – ASIC Advantage

The new IPS18 Ultra-Green flyback controller is a power saving technology used in Switch

Mode Power Supplies to keep the power consumption to a minimum. It has been optimized

for SMPSs in the 2 - 25 Watts power range that remain connected to the mains wall outlet

with an active load, as well as for applications where an SMPS has to deliver a small

amount of power in "light load" conditions. It monitors the output power from the primary

and no secondary sensing circuitry is required, which also results in power and cost

savings. It incorporates a special circuitry called “HICCUP” that involves a counter and

other digital blocks which prevent delivering a high current to the load when overloaded.

It enters cycle skipping in “no load” or light load” conditions to reduce standby power

to a trickle. The IPS18 can be used in applications where the input voltage ranges from

12 to 400Volts. It also features adjustable frequency from 15 to 500KHz (operating at high

frequency reduces size and cost of magnetic and decoupling components), separate

P & N drive to simplify EMI control, line overvoltage protection and a thermal shutdown.

In most of the applications below 10 Watts it saves costly filtering components such as

X-Cap, Y-Cap. MOV etc...

HICCUP Mode and Protection Against Feedback Loop Failure

The IPS18 flyback controller offers a built-in overload protection called “HICCUP” and

a protection against feedback loop failure with a simple low-cost Zener diode.

(see ASIC Advantage HICCUP MODE FLYBACK CONTROLLERS flyer for details).

IXTY1R4N60P – PolarHV™ Power MOSFET – IXYS

PolarHV™ Power MOSFETs are designed with IXYS unique cell design and process

improvements that dramatically enhance the power handling capability and system

efficiency. These design and process changes provide “best-in-class” on-resistance, gate

charge, thermal resistance and power handling capability. The PolarHV™ line is offered in

500V and 600V versions, with current ratings to as high as 100A. Note that 800V and higher

versions are also in development.

DSS2-60AT2 – Schottky Diode – IXYS

IXYS Schottky diodes feature very low forward voltage drop and switching loss, providing

cost effective output recitification for switch-mode power supply applications. In addition,

the 175°C rated junction temperature and low IRM extend the useful range for many of IXYS

Schottky diodes. The DSS2-60AT2 is offered in the TO-92 to minimize board area and cost.

ASIC Advantage Part Number – IPS-DK18

IXYS Part Number – EVPS001

IPS-DK18 / EVPS001 Schematic

Featured Component Summary Table

Part Number Company Summary Information Package Qty per Pack / Packing Style

IPS18C-D(1) ASIC Advantage Adj. Frequency, Overload Protected, Low Standby PWM Controller 8-Pin PDIP 50 / Tube

IPS18C-SO(1) ASIC Advantage Adj. Frequency, Overload Protected, Low Standby PWM Controller 8-Pin SOIC 98 / Tube

IPS18C-SO(1)-TR ASIC Advantage Adj. Frequency, Overload Protected, Low Standby PWM Controller 8-Pin SOIC 2500 / Tape and Reel

IXTY1R4N60P IXYS Corporation VDSS 600V, Id(25°C) 1.4A , RDS(on,25°C,Max) 9.0 Ω, Qg(on,Typ) 5.2 nC, Rth,jc 2.5 K/W D-Pak 75 / Tube

IXTY1R4N60PTRL IXYS Corporation VDSS 600V, Id(25°C) 1.4A , RDS(on,25°C,Max) 9.0 Ω, Qg(on,Typ) 5.2 nC, Rth,jc 2.5 K/W D-Pak 800 / Tape and Reel

DSS2-60AT2 IXYS Corporation VRSM/RRM 60V, IFAV(Tc = 85°C) 2A, VF(Typ, Tj = 125°C) .43V, Rth,jb 80 K/W TO-92 1000 / Bulk

DSS2-60AT2AP IXYS Corporation VRSM/RRM 60V, IFAV(Tc = 85°C) 2A, VF(Typ, Tj = 125°C) .43V, Rth,jb 80 K/W TO-92 2000 / Ammo Pack

Add “-G-LF” in place of (1) to denote RoHS + Lead Free.

Excellent Standby Operation And Overload Protection

0.5

0.45

0.4

0.35

0.3

0.25

0.2

0.15

0.1

0.05

100 120 140 160 180 200 220

Average Output Power in Overload Condition

F(Vin) / Hiccup Mode

Vin (VAC)

R13 1k

R14

3MEG

220pF

IXYS IXTY1R4N60P

IXYS DSS2-60AT2

C10

100uF 16V 105C

1.4A/600V

TX1

1.2MEG

strap

R9 2.2K

220pF

VOUT-

SCHOTTKY

ACIN1

GNDPRIMARY R7

6.19k 1%

23.7k 1%

D1 D2

1N4148

VOUT+

OPTO Q817C

10uF

16V

R10A 1k

OR PROTECTION ZENER DIODE

(1N4743A)

100uF 16V 105C

240K 0805

ACIN2

C9 68nF

0805

R10

180pF

500V

R11

100K 1%

0805

IPS18

1.5_ohm

10uF

400V

10uF

400V

TL431ILP

Q1 TAB

SNUBBER

PATENTED

TRANSFORMER 13MM

EI/EE CORE FERRITE

470 1/2W

10MEG 1%

330uH

BRIDGE

GNDSECONDARY

2A 60V

Pout(W)

Standby Power in “No Load” Conditions

† Design Kit and Evaluation System

Available for Qualified Designers

100

120

140

160

180

200

100 120 140 160 180 200 220

Vin (V AC)

Pin (mW)

PDRIVE

ISENSE

VCC

RBIAS OVERV

OPTO

GND

NDRIVE