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UC1846-SP датащи(PDF) 4 Page - Texas Instruments

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номер детали UC1846-SP
подробное описание детали  RAD-TOLERANT CLASS-V, CURRENT-MODE PWM CONTROLLER
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производитель  TI1 [Texas Instruments]
домашняя страница  http://www.ti.com
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UC1846-SP
SLUS871B
– JANUARY 2009 – REVISED OCTOBER 2011
www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
VIN = 15 V, RT = 10kΩ, CT = 4.7 nF, TA = TJ = –55°C to 125°C (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Unity-gain bandwidth
TJ = 25°C
(1)
0.7
1
MHZ
CMRR
VCM = 0 V to 38 V, VIN = 40 V
75
100
dB
PSRR
VIN = 8 V to 40 V
80
105
dB
Output sink current
VID = -15 mV to -5 V, Comp = 1.2 V
2
6
mA
Output source current
VID = 15 mV to 5 V, Comp = 2.5 V
–0.5
-0.4
mA
High-level output voltage
RL = (Comp) 15 kΩ
4.3
4.6
V
Low-level output voltage
RL = (Comp) 15 kΩ
0.7
1
V
Current Sense Amplifier Section
Amplifier gain
VC/S– = 0 V, C/L SS open
(2) (3)
2.5
2.75
3.1
V/V
Maximum differential input signal
C/L SS open(2), RL (Comp)= 15 kΩ
1.1
1.2
V
(VC/S+ – VC/S–)
Input offset voltage
VC/L SS = 0.5 V, Comp open
(2)
5
25
mV
CMRR
VCM = 1 V to 12 V
60
83
dB
PSRR
VIN = 8 V to 40 V
60
84
dB
Input bias current
VC/L SS = 0.5 V, Comp open
(4)
-10
–2.5
μA
Input offset current
VC/L SS = 0.5 V, Comp open
(4)
0.08
1
μA
Input common-mode range
VIN – 3
V
Delay to outputs
TJ = 25°C
(5)
200
500
ns
Current Limit Adjust Section
Current limit offset
VC/S– = 0 V, VC/S+ = 0 V, Comp open
(4)
0.45
0.5
0.55
V
Input bias current
VE/A+ = VREF, VE/A– = 0 V
-30
–10
μA
Shutdown Terminal Section
Threshold voltage
250
350
400
mV
Input voltage range
0
VIN
V
Minimum latching current (IC/S SS)
(6)
3
1.5
mA
Maximum non-latching current (IC/S SS)
(7)
1.5
0.8
mA
Delay to outputs
TJ = 25°C
(5)
300
600
ns
Output Section
Collector-emitter voltage
40
V
Collector leakage current
VC = 40 V
200
μA
ISINK = 20 mA
0.1
0.4
V
Output low-level voltage
ISINK = 100 mA
0.4
2.1
V
ISOURCE = 20 mA
13
13.5
V
Output high-level voltage
ISOURCE = 100 mA
12
13.5
V
Rise time
CL = 1 nF, TJ = 25°C
(5)
50
300
ns
Fall time
CL = 1 nF, TJ = 25°C
(5)
50
300
ns
Undervoltage Lockout Section
Start-up threshold
7.7
8
V
Threshold hysteresis
0.75
V
Total Standby Current
Supply current
17
21
mA
(2)
Parameter measured at trip point of latch with VE/A+ = VREF, VE/A– = 0 V.
(3)
Amplifier gain defined as: G =
ΔVComp/ΔVC/S+; VC/S+ = 0 to 1 V.
(4)
Parameter measured at trip point of latch with VE/A+ = VREF, VE/A– = 0 V.
(5)
Parameters ensured by design and/or characterization, if not production tested.
(6)
Current into C/S SS required to latch circuit in shutdown state.
(7)
Current into C/S SS assured not to latch circuit in shutdown state.
4
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© 2009–2011, Texas Instruments Incorporated
Product Folder Link(s): UC1846-SP


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