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Details, datasheet, quote on part number:NCP1203D60R2
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| Part: | NCP1203D60R2 |
| Category: | Power Management => AC-DC Controllers/Converters => AC-DC Switching => Off-Line Controllers |
| Description: | Fixed-100kHz Flyback PWM Current-mode Controller With 500V Maximum Startup, Standby Mode And Adjustable Skipping Current Level, Package: Soic, Pins=8 |
| Company: | ON Semiconductor |
| Datasheet: | Download NCP1203D60R2 datasheet File size : 144 kB |
| Request For quote: | Find where to buy NCP1203D60R2
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Datasheet text preview:
NCP1203 PWM Current-Mode Controller for Universal Off-Line Supplies Featuring Standby and Short Circuit Protection
Housed in SO-8 or DIP8 package, the NCP1203 represents a major leap toward ultra- compact Switch- Mode Power Supplies and represents an excellent candidate to replace the UC384X devices. Thanks to its proprietary SMARTMOSt Very High Voltage Technology, the circuit allows the implementation of complete off-line AC/DC adapters, battery charger and a high-power SMPS with few external components. With an internal structure operating at a fixed 40 kHz, 60 kHz or 100 kHz switching frequency, the controller features a high-voltage start-up FET which ensures a clean and loss-less start-up sequence. Its current-mode control naturally provides good audio-susceptibility and inherent pulse-by-pulse control. When the current set point falls below a given value, e.g. the output power demand diminishes, the IC automatically enters the so- called skip cycle mode and provides improved efficiency at light loads while offering excellent performance in standby conditions. Because this occurs at a user adjustable low peak current, no acoustic noise takes place. The NCP1203 also includes an efficient protective circuitry which, in presence of an output over load condition, disables the output pulses while the device enters a safe burst mode, trying to restart. Once the default has gone, the device auto- recovers. Finally, a temperature shutdown with hysteresis helps building safe and robust power supplies.
Features
http://onsemi.com MARKING DIAGRAMS
8 8 1 SO-8 D1, D2 SUFFIX CASE 751 1 8 PDIP-8 N SUFFIX CASE 626 1 1 XXXXXXXXX AWL YYWW XXXXXX ALYW
8
xx A WL, L YY, Y WW, W
= Specific Device Code = Assembly Location = Wafer Lot = Year = Work Week
PIN CONNECTIONS
Adj 1 FB 2 CS 3 Gnd 4 (Top View) 8 HV 7 NC 6 VCC 5 Drv
· · · · · · · · · · ·
High-Voltage Start-Up Current Source Auto-Recovery Internal Output Short-Circuit Protection Extremely Low No-Load Standby Power Current-Mode with Adjustable Skip-Cycle Capability Internal Leading Edge Blanking 250 mA Peak Current Capability Internally Fixed Frequency at 40 kHz, 60 kHz and 100 kHz Direct Optocoupler Connection Undervoltage Lockout at 7.8 V Typical SPICE Models Available for TRANsient and AC Analysis Pin to Pin Compatible with NCP1200
ORDERING INFORMATION
Device NCP1203P60 NCP1203D60R2 NCP1203P40 NCP1203D40R2 NCP1203P100 NCP1203D100R2 Package PDIP8 SO-8 PDIP8 SO-8 PDIP8 SO-8 Shipping 50 Units/Tube 2500/Tape & Reel 50 Units/Tube 2500/Tape & Reel 50 Units/Tube 2500/Tape & Reel
Applications
· AC/DC Adapters for Notebooks, etc. · Offline Battery Chargers · Auxiliary Power Supplies (USB, Appliances, TVs, etc.)
© Semiconductor Components Industries, LLC, 2003
1
February, 2003- Rev. 3
Publication Order Number: NCP1203/D
NCP1203
* + NCP1203 1 2 EMI FILTER UNIVERSAL INPUT 3 4 Adj FB CS VCC Gnd Drv HV 8 7 6 5 Aux. +
VOUT
+
*Please refer to the application information section
Figure 1. Typical Application Example
PIN FUNCTION DESCRIPTION
Pin No. 1 Pin Name Adj Function Adjust the skipping peak current Pin Description This pin lets you adjust the level at which the cycle skipping process takes place. Shorting this pin to ground, permanently disables the skip cycle feature. By connecting an optocoupler to this pin, the peak current setpoint is adjusted accordingly to the output power demand. Skip cycle occurs when FB falls below Vpin1. This pin senses the primary current and routes it to the internal comparator via an L.E.B. The driver's output to an external MOSFET. This pin is connected to an external bulk capacitor of typically 22 mF. This unconnected pin ensures adequate creepage distance. Connected to the high-voltage rail, this pin injects a constant current into the VCC capacitor during the start-up sequence.
2
FB
Sets the peak current setpoint
3 4 5 6 7 8
CS Gnd Drv VCC NC HV
Current sense input The IC ground Driving pulses Supplies the IC Ensure a clean and lossless start-up sequence
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NCP1203
Adj 1 HV CURRENT SOURCE 80 k SKIP CYCLE COMPARATOR INTERNAL VCC 24 k CURRENT SENSE 3 250 ns L.E.B. 40-60-100 kHz CLOCK SET Q FLIP-FLOP DCmax = 80% RESET UVLO HIGH AND LOW INTERNAL REGULATOR
HV 8
FB 2
1.2 V
+ -
NC 7
VCC Q OVERLOAD MANAGEMENT 6
20 k GROUND 4 + VREF
57 k
+ - Drv 1V ±250 mA 5
25 k
Figure 2. Internal Circuit Architecture
MAXIMUM RATINGS
Rating Power Supply Voltage Power Supply Voltage on all other pins except Pin 5 (Drv), Pin 6 (VCC) and Pin 8 (HV) Maximum Current into all pins except Pin 6 (VCC) and Pin 8 (HV) when 10 V ESD diodes are activated Thermal Resistance Junction-to-Air, PDIP8 Version Thermal Resistance Junction-to-Air, SOIC Version Maximum Junction Temperature Temperature Shutdown Hysteresis in Shutdown Storage Temperature Range ESD Capability, HBM Model, All pins except Pin 6 (VCC) and Pin 8 (HV) ESD Capability, Machine Model Maximum Voltage on Pin 6 (VCC) and Pin 8 (HV) Decoupled to Ground with 10 mF Symbol VCC, Drv -
Value 16 -0.3 to 10 5.0 100 178 150 170 30 -60 to +150 2.0 200 450
Unit V V mA °C/W °C/W °C °C °C °C KV V V
R J A R J A TJMAX -
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