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LTC4002 데이터시트(PDF) 3 Page - Linear Technology

부품명 LTC4002
상세설명  PWM LED Driver and Boost, Flyback and SEPIC Controller
PDF  24 Pages
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제조업체  LINER [Linear Technology]
홈페이지  http://www.linear.com
Logo LINER - Linear Technology

LTC4002 데이터시트(HTML) 3 Page - Linear Technology

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LTC3783
3783f
The
● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VIN = 12V, VRUN = 1.5V, VSYNC = 0V, VFBP = VREF, RT = 20k, unless otherwise specified.
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
IRUN
RUN Pin Input Current
5nA
VSENSE(MAX) Maximum Current Sense Threshold
125
150
180
mV
ISENSE(ON)
SENSE Pin Current (GATE High)
VSENSE = 0V
70
µA
ISENSE(OFF)
SENSE Pin Current (GATE Low)
VSENSE = 36V
0.2
µA
ISS
Soft-Start Pin Output Current
VSS = 0V
–50
µA
Voltage/Temperature Reference
VREF
Reference Voltage
1.218
1.230
1.242
V
●
1.212
1.248
V
IREF
Max Reference Pin Output Current
0.5
mA
∆VREF/∆VIN Reference Voltage Line Regulation
3V
≤ VIN ≤ 36V
0.002
0.02
%/V
∆VREF/∆IREF Reference Voltage Load Regulation
0mA
≤ IREF ≤ 0.5mA
0.2
1.0
%/mA
TMAX
Overtemperature SD Threshold
165
°C
Rising
THYST
Overtemperature Hysteresis
25
°C
Error Amplifier
IOV/FB
OV/FB Pin Input Current
18
60
nA
∆VOV/FB(OV) OV/FB Overvoltage Lockout Threshold VOV/FB(OV) – VOV/FB(NOM) in %, VFBP ≤ VREF
7%
VOV/FB(FB)
OV/FB Pin Regulation Voltage
2.5V < VFBP < 36V
1.212
1.230
1.248
V
IFBP, IFBN
Error Amplifier Input Current
0V
≤ VFBP ≤ VREF
–0.4
µA
2.5V < VFBP < 36V
50
µA
VFBP – VFBN Error Amplifier Offset Voltage
0V
≤ VFBP ≤ VREF
–3
3
mV
(Note 5)
2.5V < VFBP ≤ 36V (VILIM = VREF)
100
mV
2.5V < VFBP ≤ 36V (VILIM = 0.123V)
10
mV
gm
Error Amplifier Transconductance
VFBP ≤ VREF
1.7
mmho
2.5V < VFBP < 36V
14
mmho
AVOL
Error Amplifier Open-Loop Gain
500
V/V
Oscillator
fOSC
Oscillator Frequency
RFREQ = 20kΩ
250
300
350
kHz
Oscillator Frequency Range
20
1000
kHz
DMAX
Maximum Duty Cycle
85
90
97
%
fSYNC/fOSC
Recommended Max SYNC Freq Ratio fOSC = 300kHz (Note 6)
1.25
1.3
tSYNC(MIN)
SYNC Minimum Input Pulse Width
VSYNC = 0V to 5V
25
ns
tSYNC(MAX)
SYNC Maximum Input Pulse Width
VSYNC = 0V to 5V
0.8/fOSC
ns
VIH(SYNC)
SYNC Input Voltage High Level
1.2
V
VHYST(SYNC) SYNC Input Voltage Hysteresis
0.5
V
RSYNC
SYNC Input Pull-Down Resistance
100
k
Ω
tON(MIN)
Minimum On-time
With Sense Resistor, 10mV Overdrive
170
ns
No RSENSE Mode
300
ns



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