Datasheet

UCC28060
SLUS767E – MAY 2007 – REVISED NOVEMBER 2008 .................................................................................................................................................... www.ti.com
ELECTRICAL CHARACTERISTICS (continued)
At VCC = 16 V, AGND = PGND = 0 V, VINAC = 3 V, VSENSE = 6 V, HVSEN = 3 V, PHB = 5 V, R
TSET
= 133 k Ω ; all voltages
are with respect to GND, all outputs unloaded, – 40 ° C < T
J
= T
A
< +125 ° C, and currents are positive into and negative out of
the specified terminal, unless otherwise noted.
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
PULSE-WIDTH MODULATOR
K
TH
On-time factor, phases A and B, high range VINAC = 3.75 V, VSENSE = 5.8 V
(3)
1.25 1.35 1.5 µ s/V
VINAC = 3.75 V, VSENSE = 5.8 V,
K
THS
On-time factor, single-phase, A, high range 2.4 2.7 3.0 µ s/V
PHB = 0 V
(3)
K
TL
On-time factor, phases A and B, low range VINAC = 3.2 V, VSENSE = 5.8 V
(3)
3.6 4.0 4.4 µ s/V
VINAC = 3.2 V, VSENSE = 5.8 V,
K
TLS
On-time factor, single-phase, A, low range 7.2 8 8.9 µ s/V
PHB = 0 V
(3)
Phase B to phase A on-time matching,
VSENSE = 5.8 V, VINAC = 3.2 V – 6 6 %
low line range
Phase B to phase A on-time matching,
VSENSE = 5.8V, VINAC = 3.75 V – 6 6 %
high line range
COMP = 0.25 V, VINAC = 1 V 2 µ s
Zero-crossing distortion correction additional on
time
COMP = 0.25 V, VINAC = 0.1 V 20 µ s
PHB threshold falling, to single-phase operation,
To GDB output shutdown VINAC = 1.5 V 0.7 0.8 0.9 V
low line range
PHB threshold rising, to two-phase operation,
To GDB output running VINAC = 1.5 V 0.9 1.0 1.1 V
low line range
PHB threshold falling, to single-phase operation,
To GDB output shutdown VINAC = 4.0 V 1.0 1.1 1.2 V
high line range
PHB threshold rising, to two-phase operation,
To GDB output running VINAC = 4.0 V 1.2 1.3 1.4 V
high line range
COMP threshold falling to shutdown GDA and GDB outputs shutdown 0.125 0.150 0.175 V
COMP threshold rising to run GDA and GDB outputs running 0.17 0.20 0.23 V
T
(min)
Minimum switching period R
TSET
= 133 k Ω
(3)
1.7 2.2 2.5 µ s
PWM restart time ZCDA = ZCDB = 2 V
(4)
165 200 265 µ s
THERMAL SHUTDOWN
Thermal shutdown temperature T
J
, temperature rising
(5)
+160 ° C
Thermal restart temperature T
J
, temperature falling
(5)
+140 ° C
(3) Gate drive on-time is proportional to V
COMP
– 125 mV. The on-time proportionality factor, K
T
, is different in high and low ranges and also
different in two-phase and single-phase modes. The on-time factor, K
T
, scales linearly with the value of R
TSET
. The minimum switching
period is proportional to R
TSET
.
(4) An output on-time is generated at both GDA and GDB if both ZCDA and ZCDB negative-going edges are not detected for the restart
time. In single-phase mode, the restart time applies for the ZCDA input and the GDA output.
(5) Thermal shutdown occurs at temperatures higher than the normal operating range. Device performance above the normal operating
temperature is not specified or assured.
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