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LM5037MT/NOPB Datenblatt(PDF) 6 Page - Texas Instruments

Teilenummer LM5037MT/NOPB
Bauteilbeschribung  LM5037 Dual-Mode PWM Controller With Alternating Outputs
PDF  40 Pages
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Hersteller  TI [Texas Instruments]
Direct Link  http://www.ti.com
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LM5037MT/NOPB Datenblatt(HTML) 6 Page - Texas Instruments

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LM5037
SNVS578D – NOVEMBER 2008 – REVISED MAY 2015
www.ti.com
Electrical Characteristics (continued)
over operating free-air temperature range, VVIN = 48 V, VVCC = 10 V, RRT1/SYNC = 30.1 kΩ, RRT2 = 30.1 kΩ, VUVLO = 3 V (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
CURRENT LIMIT RESTART (RES PIN)
1.9
2.2
VRES
RES voltage threshold
V
TA = 25°C
2
VRES = 1.5 V
14
22
ICHG(src)
Charge source current
µA
VRES = 1.5 V, TA = 25°C
18
VRES = 1 V
5
11
IDSCHG(snk)
Discharge sink current
µA
VRES = 1 V, TA = 25°C
8
SOFT-START (SS PIN)
VSS = 0, Normal operation
70
130
VSS = 0, Normal operation, TA =
100
25°C
ISS
Charging current
µA
VSS = 0, Hiccup mode restart
0.6
1.5
VSS = 0, Hiccup mode restart, TA =
1
25°C
VSS = 2.0 V
70
130
ISS(sink)
Soft-stop current sink
µA
VSS = 2.0 V, TA = 25°C
100
OSCILLATOR (RT1/SYNC AND RT2 PINS)
RRT2 = 15 kΩ
40
105
tDEAD
Dead time
RRT2 = 15 kΩ, TA = 25°C
75
ns
RRT2 = 75 kΩ
250
RRT1/SYNC = 30.1 kΩ, RRT2 = 30.1
176
223
k
Ω
fSW1
Switching frequency 1(3)
kHz
RRT1/SYNC = 30.1 kΩ, RRT2 = 30.1
k
Ω,
200
TA = 25°C
RRT1/SYNC = 11 kΩ, RRT2 = 30.1 kΩ
441
571
fSW2
Switching frequency 2(3)
kHz
RRT1/SYNC = 11 kΩ, RRT2 = 30.1 kΩ,
508
TA = 25°C
DC voltage level
2
V
2.5
3.4
Input synchronization threshold
V
voltage
TA = 25°C
3
PWM CONTROLLER (COMP PIN)
tDLY(pwm)
Delay-to-output time
65
ns
0.7
1.2
VPWM-OS
SS to RAMP offset voltage
V
TA = 25°C
1
DMIN
Mimumum duty cycle
VSS = 0 V
0%
VFB = 0 V
4.5
5
COMP open circuit voltage
V
VFB = 0 V, TA = 25°C
4.75
VFB = 0 V, VCOMP = 0 V
0.5
1.5
COMP short circuit current
mA
VFB = 0 V, VCOMP = 0 V, TA = 25°C
1
VOLTAGE FEED-FORWARD (RAMP PIN)
20
RRAMP(sink) RAMP sink impedance (clocked)
Ω
TA = 25°C
5
(3)
Measured at OUTA, half oscillator frequency
6
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Product Folder Links: LM5037



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