Datasheet

UC1625
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UC3625
SLUS353C –NOVEMBER 2003–REVISED JUNE 2013 www.ti.com
ELECTRICAL CHARACTERISTICS
Unless otherwise stated, these specifications apply for: T
A
= 25°C; Pwr V
CC
= V
CC
= 12 V; R
OSC
= 20 kΩ to V
REF
; C
OSC
= 2 nF;
R
TACH
= 33 kΩ; C
TACH
= 10 nF; and all outputs unloaded. T
A
= T
J
.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Overall
Supply current 14.5 30.0 mA
VCC turn-on threshold Over operating range 8.65 8.95 9.45
V
VCC turn-off threshold 7.75 8.05 8.55
Overvoltage/Coast
OV-COAST inhibit threshold 1.65 1.75 1.85
OV-COAST restart threshold 1.55 1.65 1.75 V
Over operating range
OV-COAST hysteresis 0.05 0.10 0.15
OV-COAST input current -10 -1 0 μA
Logic Inputs
H1, H2, H3 low threshold 0.8 1.0 1.2
Over operating range V
H1, H2, H3 high threshold 1.6 1.9 2.0
H1, H2, H3 input current Over operating range, to 0 V -400 -250 -120 μA
QUAD SEL, dir thresholds Over operating range 0.8 1.4 2.0 V
QUAD SEL hysteresis 70 mV
DIR hysteresis 0.6 V
QUAD SEL input current -30 50 150
μA
DIR input current -30 -1 30
PWM Amp/Comparator
E/A IN(+), E/A IN(–) input current To 2.5 V -5.0 -0.1 5.0
μA
PWM IN input current To 2.5 V 0 3 30
Error amp input offset 0 V < V
COMMON-MODE
< 3 V -10 10 mV
Error amp voltage gain 70 90 dB
E/A OUT range 0.25 3.50 V
Pull-up current To 0 V -16 -10 -5 μA
S
START
Discharge current To 2.5 V 0.1 0.4 3.0 mA
Restart threshold 0.1 0.2 0.3 V
Current Amp
I
SENSE1
= 0.3 V, I
SENSE2
= 0.5 V to
Gain 1.75 1.95 2.15 V/V
0.7 V
Level shift I
SENSE1
= 0.3 V, I
SENSE2
= 0.3 V 2.4 2.5 2.65
Peak current threshold 0.14 0.20 0.26 V
I
SENSE1
= 0 V, force I
SENSE2
Over current threshold 0.26 0.30 0.36
I
SENSE1
, I
SENSE2
input current -850 -320 0
To 0 V μA
I
SENSE1
, I
SENSE2
offset current ±2 ±12
Range I
SENSE1
, I
SENSE2
-1 2 V
Tachometer/Brake
TACH-OUT high level 4.7 5 5.3
Over operating range, 10 kΩ to 2.5
V
V
TACH-OUT low level 0.2
On time 170 220 280 μs
On time change with temp Over operating range 0.1%
RC-BRAKE input current To 0 V -4.0 -1.9 mA
Threshold to brake, RC-brake Over operating range 0.8 1.0 1.2
V
Brake hysteresis, RC-brake 0.09
SPEED-IN threshold Over operating range 220 257 290 mV
SPEED-IN input current -30 -5 30 μA
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