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LM3450A Datasheet(PDF) 5 Page - Texas Instruments |
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LM3450A Datasheet(HTML) 5 Page - Texas Instruments |
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5 / 39 page  LM3450 www.ti.com SNVS681C – NOVEMBER 2010 – REVISED JUNE 2011 Electrical Characteristics (1) Unless otherwise specified VCC = 14V. Specifications in standard type face are for TJ = 25°C and those with boldface type apply over the full Operating Temperature Range ( TJ = −40°C to +125°C). Typical values represent the most likely parametric norm at TA = TJ = +25°C, and are provided for reference purposes only. Symbol Parameter Conditions Min(2) Typ(3) Max(2) Units SUPPLY VOLTAGE INPUT (VCC) VCC-RISE Controller Enable Threshold VCC Rising 12.2 13.0 13.6 V VCC-FALL Controller Disable Threshold VCC falling 7.4 7.9 8.5 Glitch Filter Delay 9 µs Turn-on Delay 40 IQ VCC Quiescent Current No Switching 1.6 mA IQ-SD VCC Shutdown Current VFB = 0V 515 625 µA ERROR AMPLIFIER & COMPENSATION (FB, COMP) VFB FB Reference (Normal Operation) 2.43 2.50 2.57 V Input Bias Current VFB = 2.5V 100 nA GM Transconductance VFB =2.5V 69 115 161 µS Output Source / Sink Capability 60 85 110 µA FB Pull-up Current Source VFB < 1.8V 43 51 59 COMP Pull-up Resistor 5 k Ω VCMP-B COMP Low Threshold (Burst) VCMP Falling VTHM -0.08 V COMP Low Hysteresis 20 VFB-SD Low Threshold (Shutdown) VFB Falling 150 168 186 FB Low Hysteresis 20 mV VFB-EAD FB Mid Threshold (EA Disabled) VFB Falling 328 346 368 FB Mid Hysteresis 20 VFB-OV FB High Threshold (Over-voltage) 1.20 x VFB 1.22 x VFB V COMP Pre-bias Source Current VCMP= 0.5V 415 µA VTHM Minimum COMP Voltage (Normal) 1.47 V ANGLE DEMODULATION & MULTIPLIER (COMP, VAC) VAC-DET VAC Angle Detection Threshold 334 356 378 mV Angle Demodulation Delay Time Both edges 8 µs VAC Dynamic Input Voltage Range 0 to 5.5 V COMP Dynamic Input Voltage Range VTHM to VTHM+2 VAC Input Impedance 500 k Ω KM Multiplier Gain (Includes Internal VAC = 3V, VCMP = 0.5 1/V Resistor Divider) VTHM+1.5V ZERO CURRENT DETECTOR (ZCD) VZCD-RIS ZCD Input Threshold VZCORising 1.45 1.5 1.55 V Hysteresis 150 200 250 mV Delay to Output 135 ns VZCD-H Positive Clamp Voltage IZCO = 1mA 6.0 V VZCD-L Negative Clamp Voltage IZCO = –50µA 0.61 PWM COMPARATOR (CS) VOS PWM Comparator Input Offset Voltage 30 mV (1) Absolute Maximum Ratings indicate limits beyond which damage to the component may occur. Operating Ratings are conditions under which operation of the device is specified and do not imply ensured performance limits. For specified performance limits and associated test conditions, see the Electrical Characteristics table. All voltages are with respect to the potential at the GND pin, unless otherwise specified. (2) All limits specified at room temperature (standard typeface) and at temperature extremes (bold typeface). All room temperature limits are 100% production tested. All limits at temperature extremes are specified via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL). (3) Typical numbers are at 25°C and represent the most likely norm. Copyright © 2010–2011, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Links: LM3450 |
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