Datasheet

UCC28610
www.ti.com SLUS888F –JANUARY 2009–REVISED SEPTEMBER 2012
ELECTRICAL CHARACTERISTICS (continued)
Unless otherwise stated: VDD = 12 V, VGG = 12 V, ZCD = 1 V, I
FB
= 10 µA, GND = 0 V, a 0.1-μF capacitor between VDD
and GND, a 0.1-μF capacitor between VGG and GND, R
CL
= 33.2 kΩ, R
MOT
= 380 kΩ, –40°C < T
A
< +125°C, T
J
= T
A
PARAMETER TEST CONDITIONS MIN TYP MAX UNITS
ZERO CROSSING DETECTION
ZCD high to low generates switching period
ZCD
(TH)
ZCD zero crossing threshold 5 20 50 mV
(t
S
has expired)
ZCD
(CLAMP)
ZCD low clamp voltage I
ZCD
= –10 μA -220 -160 -100 mV
ZCD voltage threshold to enable Driver switching periods generated at start
ZCD
(START)
0.1 0.15 0.2 V
the internal start timer timer rate
Delay from zero crossing to Driver
t
DLY(ZCD)
150-Ω pull-up to 12-V on DRV 150 ns
turn-on
Wait time for zero crossing Driver turn-on edge generated following t
S
t
WAIT(ZCD)
2 2.4 2.8
detection with previous zero crossing detected
μs
t
ST
Starter time-out period ZCD = 0 V 150 240 300
DRIVER
R
DS(on)(DRV)
Driver on-resistance I
DRV
= 4.0 A 90 190 mΩ
I
DRV(OFF)
Driver off-leakage current DRV = 12 V 1.5 20 μA
R
DS(on)(HSDRV)
High-side driver on-resistance I
DRV
= –50 mA 6 11 Ω
I
DRV(DSCH)
DRV bulk discharge current VDD open, DRV= 12 V, Fault latch set 2 2.8 3.6 mA
OVERVOLTAGE FAULT
ZCD
(OVP)
Overvoltage fault threshold at ZCD Fault latch set 4.85 5 5.15 V
ZCD blanking and OVP sample
t
BLANK(OVP)
0.6 1 1.7 μs
time from the turn-off edge of DRV
I
ZCD(bias)
ZCD Input bias current ZCD = 5 V -0.1 -0.05 0.1 μA
OVERLOAD FAULT
Current to trigger overload delay
I
FB(OL)
0 1.5 3 μA
timer
t
OL
Delay to overload fault I
FB
= 0 A continuously 200 250 325
ms
Retry delay in retry mode or after
t
RETRY
R
MOT
= 76 kΩ 750
shutdown command
Boundary R
MOT
between latch-off
R
MOT(TH)
See
(3)
100 120 150 kΩ
and retry modes
SHUTDOWN THRESHOLD
MOT
(SR)
Shutdown-Retry threshold MOT high to low 0.7 1 1.3 V
MOT current when MOT is pulled
I
MOT
MOT = 1 V –600 –450 –300 μA
low
MAXIMUM ON TIME
Latch-OFF R
MOT
= 383 kΩ 3.43 3.83 4.23
t
MOT
μs
Shutdown-retry R
MOT
= 76 kΩ 3.4 3.8 4.2
MOT MOT voltage 2.7 3 3.3 V
THERMAL SHUTDOWN
T
SD
(4)
Shutdown temperature T
J
, temperature rising
(4)
165
°C
T
J
, temperature falling, degrees below T
SD
T
SD_HYS
(4)
Hysteresis 15
(4)
(3) A latch-off or a shutdown and retry fault response to a sustained overload is selected by the range of R
MOT
.
To select the latch-off mode, R
MOT
should be greater than 150 kΩ and t
MOT
is given by R
MOT
× (1.0 × 10
-11
).
To select the shutdown-retry mode, R
MOT
should be less than 100 kΩ and t
MOT
is given by R
MOT
× (5.0 × 10
-11
).
(4) Thermal shutdown occurs at temperatures higher than the normal operating range. Device performance at or near thermal shutdown
temperature is not specified or assured.
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