Off-Line Controllers Switching Controllers NCP1338DR2G
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The NCP1338 combines a true current mode modulator and ademagnetization detector which ensures full Borderline/CriticalConduction Mode in any load/line conditions together withminimum drain voltage switching (Quasi-Resonant operation). The transformer core reset detection is done internally, without using anyexternal signal, due to the Soxyless concept. The frequency isinternally limited to 130 kHz, preventing the controller from operating above the 150 kHz CISPR-22 EMI starting limit.By monitoring the feedback pin activity, the controller entersripple mode as soon as the power demand falls below apredetermined level. As each restart is softened by an internalSoft-Skip > http://onsemi.com MARKINGDIAGRAM , and as the frequency cannot go below 25 kHz, noaudible noise can be heard.The NCP1338 also features an efficient protective circuitry which,in presence of an overcurrent condition, disables the output pulses and enters a safe burst mode, trying to restart. Once the default hasgone, the device auto-recovers. Also included is a bulk voltagemonitoring function (known as brown-out protection), an adjustable overpower compensation, and a V > PDIP-7P SUFFIXCASE 626B NCP1338PAWLYYWWG1 SOIC-7D SUFFIXCASE 751U P1338ALYW 187 (Note: Microdot may be in either location) CC OVP. Finally, an internal 4.0 msSoft-Skip eliminates the traditional startup stress. NCP1338 can beused in applications where the V > A= Assembly LocationWL, L= Wafer LotYY, Y= YearWW, W= Work WeekG, CC supply voltage is delivered by anexternal dc voltage source. > = Pb-Free Package (Top View)FBBOCSGNDDRVHVVCC Features Free-Running Borderline/Critical Mode Quasi-Resonant Operation > Soft-Skip Mode with Minimum Switching Frequency for Standby > Auto-Recovery Short-Circuit Protection Independent of AuxiliaryVoltage > Two Externally Triggerable Fault Comparators (one for a disablefunction, and the other for a permanent latch) > 500 mA Peak Current Drive Sink Capability > ORDERING INFORMATION Internal Leading Edge Blanking > Internal Temperature Shutdown > NCP1338PGPDIP-7(Pb-Free)50 Units/Rail Direct Optocoupler Connection > Dynamic Self-Supply with Levels of 12 V (On) and 10 V (Off) > NCP1338DR2GSOIC-7(Pb-Free)2500 Tape & Reel SPICE Models Available for TRANsient and AC Analysis > These are Pb-Free Devices > ՆFor information on tape and reel specifications,including part orientation and tape sizes, pleaserefer to our Tape and Reel Packaging Specification Brochure, BRD8011/D. 1234865 Typical Applications Ac-dc Adapters for Notebooks, etc. > Offline Battery Chargers > Consumer Electronics (DVD Players, Set-Top Boxes, TVs, etc.) > Auxiliary Power Supplies (USB, Appliances, TVs, etc.) >  Semiconductor Components Industries, LLC, 2008 Publication Order Number: April, 2008 - Rev. 01 NCP1338/D size="-2">

Pin No. Symbol Function Description 1 BO Brown-out and externaltriggering > By connecting this pin to the input voltage through a resistor divider, thecontroller ensures operation at a safe mains level, thanks to a 500 mVbrown-out comparator. > If an external event brings this pin above 3.0 V, the controller's output isdisabled. > If an external event brings this pin above 5.0 V, the controller ispermanently latched-off. 2 FB Sets the peak currentsetpoint > By connecting an optocoupler or an auxiliary winding to this pin, the peakcurrent setpoint is adjusted accordingly to the output power...

SQR PERM. LATCH 5 V 8 stimeout 35 smax Toff Vdd > DISABLE V < 4 V 5.5 sblanking 3 V > CC Toff Vdd > TSD TSD BO 10 A S Startup Soxyless ClkD V > CC 7.5 s minperiod V > BO Soxylessdemagdetection 500 mV SStart R1 OVP R2QQ DRV Ton 67 smax Ton > SSkipSkip FB Soxyless 3 V Setpoint 20 kHzLow-passfilter 12 V10 V5 V HV TSD Inhib > CS comp. 9.5 mA or600 500 mV A > FAULTif Zeneractivated FAULTManagement* > VCC > 300 sSoft-Skip SSkip4 msSoft-Skip V > BO 70 A x V BO - 35 A SStartPERM.LATCH OVP18.6 V > 350 nsLEB FAULT(*If FAULT duration > 80 ms = > STOPRestart when 2nd time VCC = VCCon) 2 p4 k GND >

Rating Symbol Value Unit Voltage on Pin 8 (HV) when Pin 6 (V > CC ) is Decoupled to Ground with 10 F V > HV -0.3 to 500 V Maximum Current in Pin 8 (HV) - 20 mA Power Supply Voltage, Pin 6 (V > CC ) and Pin 5 (DRV) V > CCmax -0.3 to 20 V Maximum Current in Pin 6 (V > CC ) - 30 mA Maximum Voltage on all Pins except Pin 8 (HV), Pin 6 (V > CC ) and Pin 5 (DRV) - -0.3 to 10 V Maximum Current into all Pins except Pin 8 (HV), Pin 6 (V > CC ) and Pin 5 (DRV) - 10 mA Maximum Current into Pin 6 (DRV) during ON Time and T > BLANK - 1.0 A Maximum Current into Pin 6 (DRV) after T > BLANK during OFF Time...

(For typical values T > J = 25 C, for min/max values T > J = 0 а C to +125 C, Max T > J = 150 а C,V > CC = 11 V, unless otherwise noted.) Characteristic Pin Symbol Min Typ Max Unit SUPPLY SECTION V > CC Increasing Level at which the Controller Starts 6 VCC > ON 11 12 13 V V > CC Decreasing Level at which the Controller Stops 6 VCC > MIN 9.0 10 11 V Protection Mode is Activated if V > CC reaches this Level whereas the HVCurrent Source is ON 6 VCC > OFF - 9.0 - V V > CC Decreasing Level at which the Latch-Off Phase Ends 6 VCC > LATCH 3.6 5.0 6.0 V Margin between V > CC Level at which Latch...

(continued) (For typical values T > J = 25 C, for min/max values T > J = 0 а C to +125 C,Max T > J = 150 а C, V > CC = 11 V, unless otherwise noted.) Characteristic Pin Symbol Min Typ Max Unit FEEDBACK SECTION FB Current under which FAULT is Detected 2 I > FBopen - 40 - A FB Current for which Internal Setpoint is 100% 2 I > FB100% - 50 - A FB Current above which DRV Pulses are Stopped 2 I > FBrippleIN - 220 - A FB Current under which DRV Pulses are Reauthorized after havingreached I 2 I > FBrippleOUT - 205 - A > FBrippleIN FB Current above which FB Pin Voltage is not Regulated anymore 2 I >...