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Part: NCP1560
Category:
Power Management
-> Supervisory Circuits
-> Microprocessor Supervisors
Description:
Company: ON Semiconductor
Datasheet: Download NCP1560 datasheet File size : 161 kB
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Datasheet text preview:
NCP1560 Full Featured Voltage Mode PWM Controller
The NCP1560 PWM controller contains all the features and flexibility needed to implement voltage- mode control in high performance single ended DC/DC converters. This device cost effectively reduces system part count with the inclusion of a high voltage start-up regulator that operates over a wide input range of 21.5 V to 150 V. The NCP1560 provides two control outputs, OUT1 which controls the main PWM switch and OUT2 with adjustable over-lap delay, which can control a synchronous rectifier switch or an active clamp/reset switch. Other distinctive features include: two mode over current protection, line under/over voltage lockout, fast line feedforward, soft start and a maximum duty cycle limit.
Features http://onsemi.com MARKING DIAGRAM
16 SO-16 D SUFFIX CASE 751B 1 1 NCP1560 = Device Code A = Assembly Location WL = Wafer Lot Y = Year WW = Work Week NCP1560 AWLYWW
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Minimum Operating Voltage of 21.5 V Internal High Voltage Start-up Regulator Dual Control Outputs with Adjustable Overlap Delay Single Resistor Oscillator Frequency Setting Fast Line Feedforward Line Under/Over Voltage Lockout Dual Mode Over Current Protection Programmable Maximum Duty Cycle Control Maximum Duty Cycle Proportional to Line Voltage Programmable Soft Start Precision 5.0 V Reference Telecommunication Power Converters Industrial Power Converters High Voltage Power Modules +42 V Automotive Systems Control Driven Synchronous Rectifier Power Converters
ORDERING INFORMATION
Device NCP1560HDR2 Package SO-16 Shipping 2500/Tape & Reel
Typical Applications
© Semiconductor Components Industries, LLC, 2003
1
January, 2003 - Rev. 5
Publication Order Number NCP1560/D
NCP1560
Vin
High Voltage Start-up Regulator 5.0 V Reference
VAUX
VREF
UV/OV CS
UV Fault Detection
Modulator
Delay Logic
Output Drivers
OUT1 OUT2
CSKIP RT Oscillator FF
tD
VEA SS GND
DCMAX
Figure 1. Simplified Block Diagram
http://onsemi.com
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NCP1560
1 Vin 13.8 mA 16 VAUX CA U X 14 GND Disable_VREF Vin + 1.49 V 2 UV/OV + 3.6 V VREF Disable CSKIP 6 CC S K I P One Shot Pulse (600 ns) 5 CS + + 0.6 V + 0.5 V VREF CURRENT MIRROR 9 SS CS S 7 RT RT + 1.3 V* * Trimmed during manufacturing to obtain 1.3 V with RT = 101 kW Disable_ss I1 STOP 10 pF + 2V + ++ 2V 2V Clock V I+ 125 kW + + V 10 pF CFF One Shot Pulse FF Ramp (Adjustable) + VDC(inv) 27 kW 40 kW 32 kW 8 DCMAX RP VREF RM D P Oscillator Ramp I1 2 2V Max DC Comparator 2 kW 20 kW Soft Start - + Comparator +PWM Comparator 10 VEA 11 mA + + + 2V S Clock Q Delay Logic VAUX DIS 13 OUT2 VAUX + STOP + + 11 V/7 V S Q Monotonic Start Latch (Reset Dominant) R Disable_ss 12 tD DIS 15 Output Latch (Reset Dominant) R Disable_VREF One Shot Pulse (250 ns) 5.0 V Reference DIS VREF 11 Disable VAUX
RD
OUT1
+
Vin RFF 4 FF IFF 5.3 kW 6.7 kW
Figure 2. NCP1560 Functional Block Diagram http://onsemi.com
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