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NCP1215

http://onsemi.com

15

PACKAGE DIMENSIONS

TSOP−6

CASE 318G−02

ISSUE M

0.95

0.037

1.9

0.075

0.95

0.037

ǒ

mm

inches

Ǔ

SCALE 10:1

1.0

0.039

2.4

0.094

0.7

0.028

2

3

4

5

6

A

L

1

S

G

D

B

H

C

0.05 (0.002)

DIM

MIN

MAX

MIN

MAX

INCHES

MILLIMETERS

A

0.1142 0.1220

2.90

3.10

B

0.0512 0.0669

1.30

1.70

C

0.0354 0.0433

0.90

1.10

D

0.0098 0.0197

0.25

0.50

G

0.0335 0.0413

0.85

1.05

H

0.0005 0.0040

0.013

0.100

J

0.0040 0.0102

0.10

0.26

K

0.0079 0.0236

0.20

0.60

L

0.0493 0.0610

1.25

1.55

M

0  

10  

0  

10  

S

0.0985 0.1181

2.50

3.00

_

_

_

_

NOTES:

1. DIMENSIONING AND TOLERANCING PER

ANSI Y14.5M, 1982.

2. CONTROLLING DIMENSION: MILLIMETER.
3. MAXIMUM LEAD THICKNESS INCLUDES

LEAD FINISH THICKNESS. MINIMUM LEAD
THICKNESS IS THE MINIMUM THICKNESS
OF BASE MATERIAL.

4. DIMENSIONS A AND B DO NOT INCLUDE

MOLD FLASH, PROTRUSIONS, OR GATE
BURRS.

M

J

K

*For additional information on our Pb−Free strategy and soldering

details, please download the ON Semiconductor Soldering and
Mounting Techniques Reference Manual, SOLDERRM/D.

SOLDERING FOOTPRINT*

Summary of Contents for NCP1215

Page 1: ...tages 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 na...

Page 2: ...res a gate source resistor please refer to design guidelines in this document Figure 2 Representative Block Diagram Feedback Loop Control FB Off Time Comparator CT Voffset 0 7 V 10 mA 12 5 50 mA CS GN...

Page 3: ...age Vcc 18 V FB Pins Voltage Range VFB 0 3 to 18 V CS and CT Pin Voltage Range Vin 0 3 to 10 V Thermal Resistance Junction to Air SOIC 8 Version RqJA 178 C W Junction Temperature TJ 150 C Storage Temp...

Page 4: ...um CT Pin Voltage Pin Unloaded Discharge Switch Turned On VCT min 20 mV CURRENT SENSE Minimum Source Current IFB 180 mA CT Pin Grounded ICS min 8 0 12 5 16 mA Maximum Source Current IFB 0 mA CT Pin Gr...

Page 5: ...Temperature TJ JUNCTION TEMPERATURE C Figure 7 Current Sense Source Current vs Junction Temperature TJ JUNCTION TEMPERATURE C Figure 8 Current Sense Threshold vs Junction Temperature TJ JUNCTION TEMP...

Page 6: ...CT pin Threshold vs Junction Temperature Figure 11 Drive Sink and Source Resistance vs Junction Temperature Figure 12 Current Sense Source Current vs Feedback Current Ifb FEEDBACK CURRENT mA 60 0 0 0...

Page 7: ...hile switching Furthermore the programming resistor together with the pin capacitance forms a residual noise filter which blanks spurious spikes Also fixing primary current level to a maximum value se...

Page 8: ...current source via an external capacitor controls the switch off time This is portrayed in Figure 17 Figure 17 OFF Time Control CT Voffset 10 mA From Feedback Loop Block Voffset to VDD To Latch s Set...

Page 9: ...ding internal circuitry The gate drive capability is improved because the current sense resistor is located out of the gate driver loop and does not deteriorate the turn on and also turn off gate driv...

Page 10: ...As output power diminishes the switching frequency decreases because the switch off time prolongs upon feedback loop The range of the frequency change is sufficient to keep output voltage regulation...

Page 11: ...oosing the voltage drop across the current sense resistor Let s use a value of 0 5 V The value of the current sense resistor can then be evaluated as follows eq 24 RCS VCS Ippk 0 5 0 2047 2 442 W 2 7...

Page 12: ...500 V C7 D8 MURA160T3 MTD1N60 Q1 1 2 3 4 5 8 D9 MBRS360T3 J3 1 6 5 V 800 mA L2 4 7 mH C9 470 mF 16 V R8 220 10 mF 16 V C10 BZX84C5V6 R9 1 k D7 J4 1 GND ISO1 PC817 T1 C8 1 nF Y The following oscillosc...

Page 13: ...MOSFET gate and source connections This can preclude an eventual MOSFET destruction if in the production stage the converter is powered whilst the gate is left unconnected However dealing with an extr...

Page 14: ...THRU 751 06 ARE OBSOLETE NEW STANDARD IS 751 07 A B S D H C 0 10 0 004 DIM A MIN MAX MIN MAX INCHES 4 80 5 00 0 189 0 197 MILLIMETERS B 3 80 4 00 0 150 0 157 C 1 35 1 75 0 053 0 069 D 0 33 0 51 0 013...

Page 15: ...0 0102 0 10 0 26 K 0 0079 0 0236 0 20 0 60 L 0 0493 0 0610 1 25 1 55 M 0 10 0 10 S 0 0985 0 1181 2 50 3 00 _ _ _ _ NOTES 1 DIMENSIONING AND TOLERANCING PER ANSI Y14 5M 1982 2 CONTROLLING DIMENSION MI...

Page 16: ...occur Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application Buyer shall indemnify and hold SCILLC and its officers employees subsidiaries affiliates and dis...

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