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UCC2895-W Datasheet(PDF) 5 Page - Texas Instruments

Part No. UCC2895-W
Description  BiCMOS Advanced Phase-Shift PWM Controller
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

UCC2895-W Datasheet(HTML) 5 Page - Texas Instruments

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tDELAY = tf(OUTA) - tf(OUTC)
tPERIOD
OUTA
OUTC
tDELAY = tR(OUTB) - tf(OUTA)
OUTA
OUTB
(
)
(
)
(
)
(
)
f OUTC
f OUTA
f OUTC
f OUTB
PERIOD
PERIOD
t
t
t
t
180
or
180
t
t
-
-
F =
´
F =
´
UCC1895, UCC2895, UCC3895
www.ti.com
SLUS157P – DECEMBER 1999 – REVISED JUNE 2013
ELECTRICAL CHARACTERISTICS (continued)
VDD = 12 V, RT = 82 kΩ, CT = 220 pF, RDELAB = 10 kΩ, RDELCD = 10 kΩ, CREF = 0.1 μF, CVDD = 0.1 μF and no load on the
outputs, TA = TJ. TA = 0°C to 70°C for UCC3895x, TA = –40°C to +85°C for UCC2895x and TA = –55°C to +125°C for the
UCC1895x. (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
OUTPUT
VOH
High--level output voltage (all
IOUT = –10 mA, VDD to output
250
400
mV
outputs)
VOL
Low-level output voltage (all outputs)
IOUT = 10 mA
150
250
mV
tR
Rise time(4)
CLOAD = 100 pF
20
35
ns
tF
Fall time(4)
CLOAD = 100 pF
20
35
ns
PWM COMPARATOR
EAOUT to RAMP input offset voltage
RAMP = 0 V
0.72
0.85
1.05
V
DELAB = DELCD = REF
Minimum phase shift(5)
RAMP = 0 V
0.0%
0.85%
1.4%
(OUTA to OUTC, OUTB to OUTD)
EAOUT = 650 mV
tDELAY
Delay(6)
0 V < RAMP < 2.5 V, EAOUT = 1.2 V
70
120
ns
(RAMP to OUTC, RAMP to OUTD)
DELAB = DELCD = REF
IR(bias)
RAMP bias current
RAMP < 5 V, CT = 2.2 V
–5
5
µA
IR(sink)
RAMP sink current
RAMP = 5 V, CT = 2.6 V
12
19
mA
(4)
Ensured by design. Not production tested.
(5)
Minimum phase shift is defined as:
where
(a) tf(OUTA) = falling edge of OUTA signal
(b) tf(OUTB) = falling edge of OUTB signal
(c) tf(OUTC) = falling edge of OUTC signal,
(d) tf(OUTD) = falling edge of OUTD signal
(e) tPERIOD = period of OUTA or OUTB signal
(6)
Output delay is measured between OUTA and OUTB, or OUTC and OUTD. Output delay is defined as shown below where: tf(OUTA) =
falling edge of OUTA signal, tr(OUTB) = rising edge of OUTB signal (see Figure 1 and Figure 2).
Figure 2. Same Applies to OUTC and OUTD
Figure 1. Same Applies to OUTB and OUTD
Copyright © 1999–2013, Texas Instruments Incorporated
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Product Folder Links: UCC1895 UCC2895 UCC3895


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