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LM27952 数据表(PDF) 7 Page - Texas Instruments

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部件名 LM27952
功能描述  LM27952 White LED Adaptive 1.5X/1X Switched Capacitor Current Driver
Download  17 Pages
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制造商  TI1 [Texas Instruments]
网页  http://www.ti.com
标志 TI1 - Texas Instruments

LM27952 数据表(HTML) 7 Page - Texas Instruments

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LM27952
www.ti.com
SNVS364B – MAY 2005 – REVISED MAY 2013
Typical Performance Characteristics (continued)
Unless otherwise specified: TA = 25°C, 4 LEDs, VDX = 0.45V, VIN = 3.6V, VEN = VIN, VPWM = VIN, C1 = C2 = 1µF, CIN = COUT =
3.3µF. Capacitors are low-ESR multi-layer ceramic capacitors (MLCC's).
LED Current
Output Voltage
vs.
vs.
VHR
Output Current
Figure 8.
Figure 9.
Input and Output Voltage Ripple
Startup Response
VIN = 3.6V, Load = 15mA/LED, 4 LEDs
VIN = 3.6V, Load = 20mA/LED, 4 LEDs
CH1 (TOP): VIN; Scale: 20mV/Div, AC Coupled
CH1 (TOP): VEN; Scale: 1V/Div
CH2 (BOTTOM): VOUT; Scale: 20mV/Div, AC Coupled
CH2 (BOTTOM): VOUT; Scale: 1V/Div
Time scale: 400ns/Div
Time scale: 100µs/Div
Figure 10.
Figure 11.
Copyright © 2005–2013, Texas Instruments Incorporated
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