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UCD7230 Datasheet(PDF) 7 Page - Texas Instruments

Part # UCD7230
Description  Digital Control Compatible Synchronous Buck Gate Drivers with Current Sense Conditioning Amplifier
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

UCD7230 Datasheet(HTML) 7 Page - Texas Instruments

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UCD7230
SLUS741C – NOVEMBER 2006 – REVISED MARCH 2007
ELECTRICAL CHARACTERISTICS (continued)
V
DD = PVDD = 12 V, 4.7-µF from VDD to AGND, 1 µF from PVDD to PGND, 0.1 µF from CSBIAS to AGND, 0.22 µF from BST to
SW, T
A = TJ = -40°C to +125°C, RCS+ = 5 kΩ, RDLY = 50 kΩ over operating free-air temperature range (unless otherwise
noted).
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
CURRENT SENSE COMPARATOR (INPUT SENSE)
RDLY = 24.3 kΩ (CSBIAS-CS+)
170
235
300
CS threshold
mV
RDLY = 49.9 kΩ (CSBIAS-CS+)
90
114
140
RDLY = 24.3 kΩ , IN rising to OUT1,
120
IN falling to OUT2, VDD = 6 V
CS blanking time(2)
ns
RDLY = 49.9 kΩ , IN rising to OUT1,
230
IN falling to OUT2, VDD = 6 V
RDELAY range(2)
24.3
50.0
100.0
k
Propagation delay from CS+ to
80
OUT1(2)
CS = threshold + 60mV
ns
Propagation delay from CS+ to
70
CLF(2)
CURRENT SENSE AMP
I0 = OPEN; POS = NEG = 1.25 V;
VOO
Output offset voltage
-100
0
100
mV
measure AO - IO
I0 = FLOAT; VPOS = 1.26 V; VNEG =
Closed loop dc gain
46
48
50
V/V
1.25 V, RPOS = RNEG = 0
POS = 1.25 V, NEG = 1.29 V,R =
Input impedance
5.5
8.3
12
k
(POS - NEG) / (IPOS - INEG)
VCM(max) is limited to (VDD-1.2V),
VCM
Input Common Mode Voltage Range
0
5.6
V
RPOS = 0
VPOS = 1.2 V; VNEG = 1.3 V;
A0_Vol
Minimum Output Voltage
0.15
0.3
A0_ISINK = 250 µA
V
VPOS =1.3 V; VNEG = 1.2 V; A0_
A0_Voh
Maximum Output Voltage
3
3.1
3.5
ISOURCE = 500 µA
I0 = FLOAT; VPOS = VNEG = 0.8 V to
Input Bias Current, POS or NEG
-2
30
µA
5.0 V, RPOS = RNEG = 0
ZERO CURRENT REFERENCE (IO)
Reference voltage
Measured at I0
0.54
0.6
0.66
V
Input transition voltage
With respect to IO reference
10
60
120
mV
IO
Output impedance
IZERO = 0.6 V
10
15
21
k
(2)
As designed and characterized. Not 100% tested in production.
7


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