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UCC2895N Datasheet(PDF) 3 Page - Texas Instruments

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Part No. UCC2895N
Description  BiCMOS Advanced Phase-Shift PWM Controller
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Maker  TI1 [Texas Instruments]
Homepage  http://www.ti.com
Logo TI1 - Texas Instruments

UCC2895N Datasheet(HTML) 3 Page - Texas Instruments

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UCC1895, UCC2895, UCC3895
www.ti.com
SLUS157P – DECEMBER 1999 – REVISED JUNE 2013
RECOMMENDED OPERATING CONDITIONS
(1)
MIN
NOM
MAX
UNIT
VDD
Supply voltage
10
16.5
V
VDD
Supply voltage bypass capacitor(2)
10 × CREF
CREF
Reference bypass capacitor (UCC1895)(3)
0.1
1.0
µF
CREF
Reference bypass capacitor (UCC2895, UCC3895)(3)
0.1
4.7
CT
Timing capacitor (for 500-kHz switching frequency)
220
pF
RT
Timing resistor (for 500-kHz switching frequency)
82
k
Ω
RDEL_AB, RDEL_CD Delay resistor
2.5
40
TJ
Operating junction temperature(4)
–55
125
°C
(1)
TI recommends that there be a single point grounded between GND and PGND directly under the device. There must be a separate
ground plane associated with the GND pin and all components associated with pins 1 through 12, plus 19 and 20, be located over this
ground plane. Any connections associated with these pins to ground must be connected to this ground plane.
(2)
The VDD capacitor must be a low ESR, ESL ceramic capacitor located directly across the VDD and PGND pins. A larger bulk capacitor
must be located as physically close as possible to the VDD pins.
(3)
The VREF capacitor must be a low ESR, ESL ceramic capacitor located directly across the REF and GND pins. If a larger capacitor is
desired for the VREF then it must be located near the VREF cap and connected to the VREF pin with a resistor of 51 Ω or greater. The bulk
capacitor on VDD must be a factor of 10 greater than the total VREF capacitance.
(4)
TI does not recommended that the device operate under conditions beyond those specified in this table for extended periods of time.
ELECTRICAL CHARACTERISTICS
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
UVLO (UNDERVOLTAGE LOCKOUT)
UVLO(on)
Start-up voltage threshold
10.2
11
11.8
UVLO(off)
Minimum operating voltage after
8.2
9
9.8
V
start-up
UVLO(hys)
Hysteresis
1
2
3
SUPPLY
ISTART
Start-up current
VDD = 8 V
150
250
µA
IDD
Operating current
5
6
mA
VDD_CLAMP
VDD clamp voltage
IDD = 10 mA
16.5
17.5
18.5
V
VOLTAGE REFERENCE
VREF
Output voltage
TJ = 25°C
4.94
5
5.06
10 V < VDD < VDD_CLAMP
4.85
5
5.15
V
0 mA < IREF < 5 mA
temperature
ISC
Short circuit current
REF = 0 V, TJ = 25°C
10
20
mA
ERROR AMPLIFIER
Common-mode input voltage range
–0.1
3.6
V
VIO
Offset voltage
–7
7
mV
IBIAS
Input bias current (EAP, EAN)
–1
1
µA
EAOUT_VOH High-level output voltage
EAP-EAN = 500 mV, IEAOUT = –0.5 mA
4
4.5
5
V
EAOUT_VOL Low-level output voltage
EAP-EAN = –500 mV, IEAOUT = 0.5 mA
0
0.2
0.4
ISOURCE
Error amplifier output source current
EAP-EAN = 500 mV, EAOUT = 2.5 V
1
1.5
mA
ISINK
Error amplifier output sink current
EAP-EAN = –500 mV, EAOUT = 2.5 V
2.5
4.5
AVOL
Open-loop dc gain
75
85
dB
GBW
Unity gain bandwidth(1)
5
7
mHz
Slew rate(1)
1 V < EAN <0 V, EAP = 500 mV
1.5
2.2
V/µs
0.5 V < EAOUT < 3 V
(1)
Ensured by design. Not production tested.
Copyright © 1999–2013, Texas Instruments Incorporated
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Product Folder Links: UCC1895 UCC2895 UCC3895


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