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LM2640 Folha de dados(PDF) 7 Page - Texas Instruments |
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LM2640 Folha de dados(HTML) 7 Page - Texas Instruments |
7 / 29 page LM2640 www.ti.com SNVS019B – DECEMBER 1998 – REVISED APRIL 2013 Electrical Characteristics (continued) Typicals and limits appearing in regular type apply for TJ = 25°C. Limits appearing in boldface type apply over the entire junction temperature range for operation, 0 to +125°C. Unless otherwise specified under the Parameter or Conditions columns, VIN = 10V, and VSD = VON/OFF1 = VON/OFF2 = 5V (1)(2)(3) Symbol Parameter Conditions Typical Limit Units Secondary Feedback Threshold 2.5 V Voltage (2NDFB/FPWM) 2.4 V(min) 2.6 V(max) (2NDFB/FPWM) Pin VSD = 2.4V 40 80 µA(max) Pull-Up Current VON/OFF1 = 0V, VON/OFF2 = 2.4V (2NDFB/FPWM) Pin VSD = 2.4V ±0.1 µA Input Leakage Current VON/OFF1 = 0V, VON/OFF2 = 2.4V Gate Drive VBOOT Bootstrap Voltage (Voltage from CBOOT1 and CBOOT2 Source 1 µA 4.5 V CBOOT1 to SW1 and from Each 4.3 V(min) CBOOT2 to SW2) HDRV1 and HDRV2 Sink and 0.35 A Source Current LDRV1 and LDRV2 Sink and 0.35 A Source Current HDRV1 and HDRV2 High-Side VCBOOT1 = VCBOOT2 = 5V, 6 Ω On-Resistance VSW1 = VSW2 = 0V HDRV1 and HDRV2 Low-Side VCBOOT1 = VCBOOT2 = 5V, 4 Ω On-Resistance VSW1 = VSW2 = 0V LDRV1 and LDRV2 High-Side VLIN = 5V 8 Ω On-Resistance LDRV1 and LDRV2 Low-Side VLIN = 5V 4 Ω On-Resistance Oscillator FOSC Oscillator Frequency 200 kHz 170 kHz(min) 230 kHz(max) 160 kHz(min) −40°C ≤ TJ ≤ +125°C 200 230 kHz(max) Minimum OFF-Time VFB1 = 1V, Measured at HDRV1 250 ns 350 ns(max) Maximum Frequency of 400 kHz(min) Synchronization Minimum Width of SYNC Pulses are Low-Going 200 ns(min) Synchronization Pulses Error Amplifier IFB1, IFB2 Feedback Input Bias Current VFB1 = VFB2 = 1.4V 100 nA 250 nA(max) VFB1 = VFB2 = 1.4V 100 360 nA(max) −40°C ≤ TJ ≤ +125°C ICOMP1, ICOMP2 COMP Output Source Current VFB1 = VFB2 = 1V, 90 µA VCOMP1 = VCOMP2 = 1V 40 µA(min) ICOMP1, ICOMP2 COMP Output Sink Current VFB1 = VFB2 = 1.4V, 60 µA VCOMP1 = VCOMP2 = 0.2V 40 µA(min) Voltage References and Linear Voltage Regulator VBG Bandgap Voltage 1.238 V Copyright © 1998–2013, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Links: LM2640 |
Nº de peça semelhante - LM2640_15 |
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Descrição semelhante - LM2640_15 |
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