ACST1635-8FP STMicroelectronics, ACST1635-8FP Datasheet - Page 8

• Manufacturer Part Number: ACST1635-8FP
• Description: Triacs OverVltg protected AC switch 1500 Vrms
• Manufacturer: STMicroelectronics

Specifications of ACST1635-8FP

• Rohs: yes
• On-state Rms Current (it Rms): 16 A
• Non Repetitive On-state Current: 147 A
• Rated Repetitive Off-state Voltage Vdrm: 800 V
• Off-state Leakage Current @ Vdrm Idrm: 1 uA
• Holding Current (ih Max): 30 mA
• Gate Trigger Voltage (vgt): 1 V
• Gate Trigger Current (igt): 1.75 mA
• Maximum Operating Temperature: + 150 C
• Mounting Style: Through Hole
• Package / Case: TO-220FPAB-3
• Minimum Operating Temperature: - 40 C

Application information
2.2
8/13
AC line transient voltage ruggedness
In comparison with standard Triacs, which needs additional protection components against
surge voltage, the ACST1635-8FP is self-protected against over-voltage, specified by the
new parameter V
voltages either by clamping the low energy spikes, such as the inductive spikes at switch off,
or by switching to the on state (for less than 10 ms) to dissipate higher energy shocks
through the load. This safety feature works even with high turn-on current ramp-up.
The test circuit of
stress the ACST switch according to the IEC 61000-4-5 standard conditions. With the
additional effect of the load which is limiting the current, the ACST switch withstands the
voltage spikes up to 2 kV on top of the peak line voltage. The protection is based on an
overvoltage crowbar technology. The ACST1635-8FP folds back safely to the on state as
shown in
surge and the next zero crossing current. Such a non repetitive test can be done at least 10
times on each AC line voltage polarity.
Figure 19. Overvoltage ruggedness test circuit for resistive and inductive loads for
AC mains
Figure
IEC 61000-4-5 standards
Filtering unit
20. The ACST1635-8FP recovers its blocking voltage capability after the
CL
Figure 19
. The ACST1635-8FP switch can safely withstand AC line transient
represents the ACST1635-8FP application, and is used to
Doc ID 023630 Rev 1
R =
6
Ω
Surge generator
, L =
R = 62
2kV surge
Rgene
g
2
µH, V
Ω
sur ge
= 2 kV
Model of the load
R
L
ACST1635-8FP
ACST
Rg