Datasheet LT3932, LT3932-1 (Analog Devices) - 9
| 制造商 | Analog Devices |
| 描述 | 36V, 2A Synchronous Step-Down LED Driver |
| 页数 / 页 | 30 / 9 — TYPICAL PERFORMANCE CHARACTERISTICS VIN = 12V, unless otherwise noted. … |
| 修订版 | B |
| 文件格式/大小 | PDF / 4.7 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS VIN = 12V, unless otherwise noted. C/10 Threshold. DA Current Limit
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LT3932/LT3932-1
TYPICAL PERFORMANCE CHARACTERISTICS VIN = 12V, unless otherwise noted. C/10 Threshold DA Current Limit Internal PWM Duty Ratio (10%)
18 2.5 200 RISING 150°C 250 UNITS FALLING 25°C VPWM = 1.1V 16 2.4 –50°C 160 14 (mV) 2.3 120 ISN 12 - V 2.2 80 V ISP 10 SW CURRENT (A) NUMBER OF UNITS 2.1 40 8 6 2.0 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 8.6 9 9.4 9.8 10.2 10.6 11.0 11.4 11.8 TEMPERATURE (°C) TEMPERATURE (°C) PWM DUTY RATIO (%) 3932 G37 3932 G38 3932 G39
Internal PWM Duty Ratio (90%) Input Voltage Transient Response Input Voltage Transient Response
200 150°C 250 UNITS 25°C VPWM = 1.9V –50°C 160 VIN VIN 10V/DIV 10V/DIV 120 I I LED LED 100mA/DIV 100mA/DIV 80 NUMBER OF UNITS 40 1ms/DIV 3932 G41 1ms/DIV 3932 G42 FRONT PAGE APPLICATION FRONT PAGE APPLICATION 0 15V TO 25V INPUT VOLTAGE STEP 25V TO 15V INPUT VOLTAGE STEP 88.6 89 89.4 89.8 90.2 90.6 91.0 91.4 91.8 3 LEDs (APPROX. 9V) 3 LEDs (APPROX. 9V) PWM DUTY RATIO (%) 3932 G40
Turn-On and Turn-Off Start-Up with 10% Internal PWM Start-Up with 90% Internal PWM
VIN V 20V/DIV IN VIN 20V/DIV 20V/DIV VOUT VOUT VOUT 5V/DIV 5V/DIV 5V/DIV ILED ILED ILED 500mA/DIV 500mA/DIV 500mA/DIV 5ms/DIV 3932 G43 5ms/DIV 3932 G44 5ms/DIV 3932 G45 FRONT PAGE APPLICATION FRONT PAGE APPLICATION WITH PWM = 1.1V FRONT PAGE APPLICATION WITH PWM = 1.9V 3 LEDs (APPROX. 9V) 3 LEDs (APPROX. 9V) 3 LEDs (APPROX. 9V) Rev B For more information www.analog.com 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS VIN = 12V, unless otherwise noted. C/10 Threshold DA Current Limit Internal PWM Duty Ratio (10%)
18 2.5 200 RISING 150°C 250 UNITS FALLING 25°C VPWM = 1.1V 16 2.4 –50°C 160 14 (mV) 2.3 120 ISN 12 - V 2.2 80 V ISP 10 SW CURRENT (A) NUMBER OF UNITS 2.1 40 8 6 2.0 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 8.6 9 9.4 9.8 10.2 10.6 11.0 11.4 11.8 TEMPERATURE (°C) TEMPERATURE (°C) PWM DUTY RATIO (%) 3932 G37 3932 G38 3932 G39
Internal PWM Duty Ratio (90%) Input Voltage Transient Response Input Voltage Transient Response
200 150°C 250 UNITS 25°C VPWM = 1.9V –50°C 160 VIN VIN 10V/DIV 10V/DIV 120 I I LED LED 100mA/DIV 100mA/DIV 80 NUMBER OF UNITS 40 1ms/DIV 3932 G41 1ms/DIV 3932 G42 FRONT PAGE APPLICATION FRONT PAGE APPLICATION 0 15V TO 25V INPUT VOLTAGE STEP 25V TO 15V INPUT VOLTAGE STEP 88.6 89 89.4 89.8 90.2 90.6 91.0 91.4 91.8 3 LEDs (APPROX. 9V) 3 LEDs (APPROX. 9V) PWM DUTY RATIO (%) 3932 G40
Turn-On and Turn-Off Start-Up with 10% Internal PWM Start-Up with 90% Internal PWM
VIN V 20V/DIV IN VIN 20V/DIV 20V/DIV VOUT VOUT VOUT 5V/DIV 5V/DIV 5V/DIV ILED ILED ILED 500mA/DIV 500mA/DIV 500mA/DIV 5ms/DIV 3932 G43 5ms/DIV 3932 G44 5ms/DIV 3932 G45 FRONT PAGE APPLICATION FRONT PAGE APPLICATION WITH PWM = 1.1V FRONT PAGE APPLICATION WITH PWM = 1.9V 3 LEDs (APPROX. 9V) 3 LEDs (APPROX. 9V) 3 LEDs (APPROX. 9V) Rev B For more information www.analog.com 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Typical Performance Characteristics Pin Functions Block Diagram Operation Typical Applications Package Description Revision History Typical Application Related Parts