Datasheet

 
SLUS318B – APRIL 1999 – REVISED JANUARY 2002
5
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electrical characteristics over recommended operating conditions, VCC = 12 V; CT = 1 nF,
R_TACH = 250 kΩ, C_TACH = 100 pF, T
A
= T
J
, T
A
= –40°C to 85°C for the UCC2626, and 0°C to 70°C
for the UCC3626 (unless otherwise noted)
hall buffer inputs
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
High-level input voltage HALLA, HALLB, HALLC 1.7 1.9 2.1 V
Hysteresis HALLA, HALLB, HALLC 0.6 1.0 V
Input current 0V < VIN < 5 V –25 µA
oscillator
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Frequency R
TACH
= 250 kΩ, C
T
= 1nF 9.0 10.0 11.0 kHz
Frequency change with voltage 12 V < VCC < 14.5 V 3%
CT peak voltage 7.25 7.5 7.75 V
CT peak-to-valley voltage 4.75 5.0 5.25 V
SYNCH pin minimum pulse width 500 ns
tachometer
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
High-level output voltage/VREF I
OUT
= –10 µA 99% 100%
Low-level output voltage I
OUT
= 10 µA 0 20 mV
High-level on-resistance I
OUT
= –100 µA 1 1.5 kΩ
Low-level on-resistance I
OUT
= 100 µA 1 1.5 kΩ
High-level ramp threshold voltage 2.5 V
Ramp voltage 2.375 2.500 2.625 V
C
TACH
charge current R
TACH
= 49.9 kΩ 48 51 53 µA
On time accuracy
UCC3626 See Note 1 –3% 3%
On-time accuracy
UCC2626 See Note 1 –4% 3%
direction output
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
High-level output voltage I
OUT
= –100 µA 4.5 5.2 V
Low-level output voltage I
OUT
= 100 µA 0 0.5 V
output
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Maximum duty cycle 100%
Lo le el o tp t oltage
I
OUT
= 2 mA 0.0 0.1 0.5 V
Low-level output voltage
I
OUT
= 100 µA 0.0 0.1 V
High level output voltage
I
OUT
= –2 mA 4.0 4.8 5.2 V
High-level output voltage
I
OUT
= –100 µA 4.7 5.2 V
Rise and fall time CI = 10 pF 100 ns
NOTE 1: t
ON
is calculated using the formula t
ON
+
C
TACH
ǒ
V
HI
* V
LO
Ǔ
I
CHARGE