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Details, datasheet, quote on part number:NCP1215DR2
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| Part: | NCP1215DR2 |
| Category: | Power Management => AC-DC Controllers/Converters => AC-DC Switching => Off-Line Controllers |
| Description: | Variable Off Time Smps, Package: Soic, Pins=8 |
| Company: | ON Semiconductor |
| Datasheet: | Download NCP1215DR2 datasheet File size : 147 kB |
| Request For quote: | Find where to buy NCP1215DR2
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Datasheet text preview:
NCP1215 Product Preview Low Cost Variable OFF Time Switched Mode Power Supply Controller
The NCP1215 is a controller for low power off-line flyback Switched Mode Power Supplies (SMPS) featuring low size, weight and cost constraints together with a good low standby power performance. The operating principle uses switching frequency reduction at light load by increasing the OFF Time. Also, when OFF Time expands, the peak current is gradually reduced down to approximately 1/4 of the maximum peak current to prevent from exciting the transformer mechanical resonances. The risk of acoustic noise is thus greatly diminished while keeping good standby power performance. A low power internal supply block also ensures very low current consumption at start-up without hampering the standby power performance. A special primary current sensing technique minimizes the impact of SMPS switching on control IC operation. The choice of peak voltage across the current sense resistor allows dissipation to be further reduced. The negative current sensing technique offers advantages over a traditional approach by avoiding the voltage drop incurred by traditional MOSFET source sensing. Thus, the IC drive capability is greatly improved. Finally, the bulk input ripple ensures a natural frequency dithering which smooths the EMI signature.
Features http://onsemi.com MARKING DIAGRAMS
8 SO-8 D SUFFIX CASE 751 1 1 6 TSOP-6 (SOT23-6, SC59-6) SN SUFFIX CASE 318G 1 FAA A L Y W P1215 ALYW
8
6 1
FAAYW
= Specific Device Code = Assembly Location = Wafer Lot = Year = Work Week
PIN CONNECTIONS
SO-8 FB 1 CT 2 CS 3 GND 4 (Top View) TSOP-6 CS GND CT 1 2 3 (Top View) 6 5 4 Gate VCC FB 8 7 6 5 NC NC VCC Gate
ท ท ท ท ท ท ท ท ท ท ท
Variable OFF Time Control Method Very Low Current Consumption at Start-up Natural Frequency Dithering for Improved EMI Signature Current Mode Control Operation Peak Current Compression Reduces Transformer Noise Programmable Current Sense Resistor Peak Voltage Undervoltage Lockout Auxiliary Power Supply Stand-by Power Supply AC/DC Adapter Off-line Battery Charger
Typical Applications
ORDERING INFORMATION
Device NCP1215DR2 NCP1215SNT1
This document contains information on a product under development. ON Semiconductor reserves the right to change or discontinue this product without notice.
Package SO-8 TSOP-6
Shipping 2500 Tape & Reel 3000 Tape & Reel
ฉ Semiconductor Components Industries, LLC, 2003
1
May, 2003 - Rev. 0
Publication Order Number: NCP1215/D
NCP1215
Line + + + FB CT CS N NC NC Vcc -
+
GND Gate
Figure 1. Typical Application
FB
Feedback Loop Control
VDD Iref Off-T ime Comparator Reference Regulator
Voffset + Ct 10 mA 0-7 V - +
+ -
VCC 12/8.5 V
Undervoltage Lockout
CS 12.5-50 mA
Set Q
Gate Driver Gate
Current Sense Comparator GND + - Reset Q
Figure 2. Representative Block Diagram
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NCP1215
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PIN FUNCTION DESCRIPTION
TSOP-6 4 3 1 2 6 5 7 8 SO-8 1 2 3 4 5 6 7 8 Symbol FB Description The FB pin provides voltage feedback loop. The current injected into the pin determines the primary switch OFF time interval. It also influences the peak value of the primary current. Connection for an external timing programming capacitor. The CS pin senses the power switch current. Primary and internal ground. Output drive for an external power MOSFET. Power supply voltage and Undervoltage Lockout. Unconnected pin. Unconnected pin. CT CS GND Gate Vcc NC NC
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MAXIMUM RATINGS
Rating Symbol Vcc Value 18 Unit V V V Power Supply Voltage FB Pins Voltage Range VFB Vin -0.3 to 18 -0.3 to 10 178 150 -60 to +150 2.0 1.5 200 150 CS and CT Pin Voltage Range Thermal Resistance, Junction-to-Air (SO-8 Version) Junction Temperature Storage Temperature Range ESD Voltage Protection, Human Body Model (Except Ct Pin) ESD Voltage Protection, Human Body Model for Ct Pin ESD Voltage Protection, Machine Model (Except Ct Pin) ESD Voltage Protection, Machine Model for Ct Pin R J A Tj Tstg VESD- HBM VESD- HBM- Ct VESD- MM VESD- MM- Ct ฐC/W ฐC ฐC kV kV V V
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