ncp1450-d ON Semiconductor, ncp1450-d Datasheet
ncp1450-d
Related parts for ncp1450-d
ncp1450-d Summary of contents
Page 1
... The NCP1450A series are PWM step−up DC−DC switching controller that are specially designed for powering portable equipment from one or two cells battery packs. The NCP1450A series have a driver pin, EXT pin, for connecting to an external transistor. Large output currents can be obtained by connecting a low ON−resistance external power transistor to the EXT pin ...
Page 2
... EXT Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á NCP1450A CE EXT 1 5 OUT ...
Page 3
... NCP1450ASN27T1 NCP1450ASN30T1 3.0 V NCP1450ASN30T1G NCP1450ASN33T1 3.3 V NCP1450ASN33T1G NCP1450ASN50T1 5.0 V NCP1450ASN50T1G †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. 1. The ordering information lists five standard output voltage device options. Additional devices with output voltage ranging from 1 ...
Page 4
... OUT means setting of output voltage. SET 6. This parameter is guaranteed by design pin is integrated with an internal 150 nA pullup current source. NCP1450A (For all values T = 25°C, unless otherwise noted −40°C to 85°C) 0.96) = −40°C to 85° 5 − ...
Page 5
... Figure 6. NCP1450ASN19T1 Efficiency vs. 100 220 mF = 25°C 0 100 1000 0.01 0.1 Figure 8. NCP1450ASN50T1 Efficiency vs. http://onsemi.com 400 600 800 1000 I , OUTPUT CURRENT (mA) O vs. Output Current ...
Page 6
... Current vs. Temperature NCP1450A 3.2 3.1 3.0 2.9 NCP1450ASN30T1 2 1 2.7 75 100 −50 −25 0 TEMPERATURE (°C) Figure 10. NCP1450ASN30T1 Output Voltage 100 NCP1450ASN19T1 1 0.96 OUT Open−Loop Test 0 75 100 −50 −25 0 TEMPERATURE (°C) Figure 12. NCP1450ASN19T1 Operating Current vs. Temperature 200 180 160 ...
Page 7
... Temperature 1.0 NCP1450ASN30T1 V = 5.0 V OUT 0 Open−Loop Test 0.6 0.4 0.2 0.0 −50 − TEMPERATURE (°C) Figure 19. NCP1450ASN30T1 Off−State Current vs. Temperature NCP1450A NCP1450ASN30T1 3 0.5 V OUT Open−Loop Test 0 75 100 −50 −25 TEMPERATURE (°C) Figure 16. NCP1450ASN30T1 Standby Current 1.0 NCP1450ASN19T1 ...
Page 8
... TEMPERATURE (°C) Figure 24. NCP1450ASN19T1 Maximum Duty Cycle vs. Temperature 100 NCP1450ASN50T1 5 0.96 OUT Open−Loop Test 40 75 100 −50 −25 0 TEMPERATURE (°C) Figure 26. NCP1450ASN50T1 Maximum Duty Cycle vs. Temperature http://onsemi.com 100 100 100 ...
Page 9
... NCP1450ASN30T1 0.96 OUT 0.4 V EXT Open−Loop Test 30 −50 − TEMPERATURE (°C) Figure 31. NCP1450ASN30T1 EXT “L” Output Current vs. Temperature NCP1450A −20 −30 −40 −50 NCP1450ASN30T1 0.96 OUT − − 0.4 V EXT OUT Open−Loop Test −70 75 100 − ...
Page 10
... ON−Resistance vs. Temperature 25 NCP1450ASN30T1 0.96 OUT 0.4 V EXT Open−Loop Test −50 − TEMPERATURE (°C) Figure 37. NCP1450ASN30T1 EXT “L” ON−Resistance vs. Temperature NCP1450A NCP1450ASN30T1 3 0.96 OUT − 0.4 V EXT OUT Open−Loop Test 0 75 100 −50 − ...
Page 11
... OUT 140 T = 25°C A 120 100 200 400 600 I , OUTPUT CURRENT (mA) O Figure 43. NCP1450ASN30T1 Ripple Voltage vs. Output Current NCP1450A 1.0 0.8 NCP1450ASN30T1 0 0 OUT 0.4 0.2 0 100 −50 −25 Figure 40. NCP1450ASN30T1 Startup/Hold 200 NCP1450ASN19T1 180 ...
Page 12
... Figure 48. NCP1450ASN30T1 Startup/Hold Voltage vs. Output Current (Using BJT) 2.0 1.6 1.2 0.8 0.4 = 220 mF = 25°C 0.0 80 100 0 Figure 50. NCP1450ASN50T1 Startup/Hold Voltage vs. Output Current (Using BJT) http://onsemi.com 12 V start V hold OUTPUT CURRENT (mA start V hold NCP1450ASN30T1 MMJT9410 = 220 mF ...
Page 13
... Waveforms (Medium Load) NCP1450A OUT IN C OUT 1.0 V/div 500 mA/div mV/div, AC coupled OUT Figure 52. NCP1450ASN19T1 Operating Waveforms (Heavy Load 3 1 OUT IN C OUT 2.0 V/div 500 mA/div mV/div, AC coupled OUT Figure 54. NCP1450ASN30T1 Operating ...
Page 14
... Figure 61. NCP1450ASN50T1 Load Transient Response NCP1450A = 1 4.7 mH 1.9 V (AC coupled), 200 mV/div OUT 100 Figure 58. NCP1450ASN19T1 Load Transient Response = 2 4.7 mH 3.0 V (AC coupled), 200 mV/div OUT 100 Figure 60. NCP1450ASN30T1 Load Transient Response = 3 ...
Page 15
... 560 0.003 220 mF OUT = 25° 100 1000 0.01 0.1 Figure 68. NCP1450ASN50T1 Efficiency vs. http://onsemi.com 2 2 NCP1450ASN30T1 MMJT9410 = 560 0.003 220 mF C OUT T = 25°C ...
Page 16
... V = 3.0 V OUT 0. Figure 70. NCP1450ASNXXT1 No Load Input Supplier Part Number Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á CD54−100MC Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á Á ...
Page 17
... NCP1450A DETAILED OPERATING DESCRIPTION Soft Start There is a soft start circuit in NCP1450A. When power is applied to the device, the soft start circuit first pumps up the output voltage to approximately 1 fixed duty cycle. This is the voltage level at which the controller can operate normally ...
Page 18
... External Component Selection Inductor Selection The NCP1450A is designed to work well with a 6 inductors in most applications sufficiently low value to allow the use of a small surface mount coil, but large enough to maintain low ripple. Lower inductance values supply higher output current, but also increase the ripple and reduce efficiency ...
Page 19
... NCP1450ASN19T1 1.9 V NCP1450ASN30T1 3.0 V NCP1450ASN50T1 5.0 V NCP1450ASN19T1 1.9 V NCP1450ASN30T1 3.0 V NCP1450ASN50T1 5.0 V NCP1450A more efficient switch than a BJT transistor. However, the MOSFET requires a higher voltage to turn on as compared with BJT transistors. An enhancement N−channel MOSFET , and the can be selected by the following guidelines Low ON−resistance Low gate threshold voltage, V ...
Page 20
... PCB are shown in Figures 71 and 72. Please contact your Figure 71. NCP1450A PWM Step−up DC−DC Controller Evaluation Board Silkscreen Figure 72. NCP1450A PWM Step−up DC−DC Controller Evaluation Board Artwork (Component Side) NCP1450A ON Semiconductor representative for availability. The evaluation board schematic diagrams are shown in Figures 73 and 74 ...
Page 21
... The output capacitor should be placed close to the output terminals to obtain better smoothing effect on the output ripple. Switching Noise Decoupling Capacitor A 0.1 mF ceramic capacitor should be placed close to the OUT pin and GND pin of the NCP1450A to filter the switching spikes in the output voltage monitored by the OUT pin. http://onsemi.com 21 ...
Page 22
... G 0.85 1.05 0.0335 0.0413 H 0.013 0.100 0.0005 0.0040 J 0.10 0.26 0.0040 0.0102 K 0.20 0.60 0.0079 0.0236 L 1.25 1.55 0.0493 0.0610 2.50 3.00 0.0985 0.1181 2.4 0.094 mm inches ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative. NCP1450A/D ...