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LM3447 データシート(PDF) 3 Page - Texas Instruments

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部品番号 LM3447
部品情報  Phase Dimmable, Primary Side Power Regulated PFC Flyback Controller for LED Lighting
PDF  25 Pages
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

LM3447 データシート(HTML) 3 Page - Texas Instruments

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LM3447
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SNOSC65 A – APRIL 2012 – REVISED MAY 2012
RECOMMENDED OPERATING CONDITIONS
(1)
over operating free-air temperature range (unless otherwise noted)
MIN
TYP
MAX
UNIT
VCC
Input Voltage
7.5
14
17.5
V
IBIAS
BIAS current from a high impedance source
500
μA
IVAC
VAC current from a high impedance source
500
μA
TJ
Operating junction temperature
–40
25
125
°C
(1)
For specified performance limits and associated test conditions, see the Electrical Characteristics table.
ELECTROSTATIC DISCHARGE (ESD) PROTECTION
MAX
UNIT
Human Body Model (HBM)
2
kV
Field Induced Charged Device Model (FICDM)
750
V
ELECTRICAL CHARACTERISTICS
Unless otherwise specified –40°C < TJ = TA < 125°C, VCC = 14V, VTSNS = 1.75V, VFLT2 = 1.75V, VAUX = 0.5V, VINV = 0V, SP
IVAC = 100μA, IBIAS = 100μA, CVCC = 10μF, CCOMP = 0.047μF, RHLD = 10kΩ.
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
INPUT SUPPLY (VCC)
Rising threshold
9.5
10.5
11.5
V
VCC(UVLO)
Falling threshold
6.8
7.5
8.3
V
Hysteresis
3
V
Rising threshold
17.7
18.89
20.1
V
VCC(OVP)
Falling threshold
17.5
18.72
19.9
V
Hysteresis
175
mV
Startup current
VCC = 6.7V, VINV = 0 V
180
μA
IVCC
Standby current
VINV = 1.75V, VAUX = 1 V
1.6
mA
Switching current
CGATE = 1 nF
3.3
mA
INPUT VOLTAGE FEEDFORWARD and ANGLE DETECTION (VAC, FF)
VAC(CLAMP)
VAC clamp voltage
1.24
V
IVAC(ANGLE)
Dimmer angle detect threshold
Sweep IVAC
66
μA
IVAC(HOLD)
HOLD FET turn-on threshold
Sweep IVAC, VFLT2 = 0 V
95
μA
IFF
Feedforward source current
VGATE = VCC, IVAC = 100 µA
10
μA
DIMMING DECODER CIRCUIT (FLT1, FLT2)
FLT1(HIGH)
FLT1 voltage high
FLT1 open
1.67
1.75
1.83
V
FLT2(MIN)
Minimum dimming decode voltage
VFLT2 falling
263
290
315
mV
G(DECODE)
Decode gain, VINV/VFLT2
0.877
FLT2HOLD(EN)
HOLD circuit enable threshold
VFLT2 falling
1
V
FLT2HOLD(DIS)
HOLD circuit disable threshold
VFLT2 rising
1.2
V
HOLD CIRCUIT (HOLD)
RDS(ON)
HOLD MOSFET on-resistance
IVAC = 50 μA, VFLT2 = 1 V
24
Ω
PRE-REGULATOR GATE BIAS CIRCUIT (BIAS)
BIAS(HIGH)
BIAS high voltage clamp
VCC < VCC(UVLO)
16.1
17.7
19.3
V
BIAS(LOW)
BIAS low voltage clamp
VCC > VCC(UVLO)
12.3
13.5
14.7
V
Copyright © 2012, Texas Instruments Incorporated
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