IES5528 Hendon Semiconductors, IES5528 Datasheet - Page 2

• Manufacturer Part Number: IES5528
• Description: Phase Controller And Triac Triggering Ic
• Manufacturer: Hendon Semiconductors

5
5.1
6
The IES5528 can be broken down
into the following functional blocks:
• power supply derived from mains
• power on reset to ensure correct
• zero-crossing detector
• difference amplifier passing a
• ramp function generator operating
• output amplifier driving the triac
• gate sense for reduction in the
2009 Nov 02, Revision 8.1
AC via dropping resistor Rs
start-up
synchronizes triac gate pulses
signal from a sensor, indication of a
potentiometer setting or switch
position.
as the saw-tooth oscillator in time
proportional or phase control;
gate.
number of pulses produced when
firing the triac;
PINNING INFORMATION
FUNCTIONAL DESCRIPTION
Pinning Layout
DIFFEN
XOUT
SDIS
QC+
QC−
PW
IC+
IC−
Fig.2 Pin configuration
4
1
2
5
6
7
8
3
IES5528
5528-pin
16
15
13
12
11
10
14
9
FLY
SAW
RMNS
V EE
XDIS
TRIG
AMPIN
V
6.1
The IES5528 has been designed
such that mains is supplied directly to
pin RMNS via a dropping resistor
(Rs). V
neutral/common line. The circuit
produces a negative supply voltage at
V
to limit the DC voltage generated
between V
may be used for low power external
circuit such as a temperature sensing
bridge.
The value of Rs should be chosen
such that it can supply the current for
the IES5528, plus the charge required
to drive the triac gate and any
external (peripheral) circuits. Any
excess current is bypassed through
the internal regulator. The maximum
rated current must not be exceeded.
CC
EE
and has an inbuilt shunt regulator
Supply
CC
is connected to the
Phase Controller and Triac Triggering IC
CC
and V
2
EE
5.2
PW
XOUT
DIFFEN
QC+
IC+
IC−
QC−
SDIS
AMPIN
TRIG
V
V
RMNS
SAW
FLY
XDIS
SYMBOL
. This supply
EE
CC
Pin Description
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
PIN
Is
The supply current available to the
IES5528 when supplied via a
dropping resistor (Rs) from mains can
be calculated as follows:
Where V
across optional diode Ds (refer to
figure 1).
During the positive half of the mains
voltage cycle the external smoothing
capacitor C1 supplies the IES5528.
The IES5528 may also be powered
with an external DC supply into V
via a current limiting resistor. With
V
requirements may need to be
considered. Care must be taken not
to exceed the maximum allowable
current into the supply.
pulse width control input
zero-crossing detector output
difference amplifier enable output
comparator non-inverting output
comparator non-inverting input
comparator inverting input
comparator inverting output
triac gate sense disable input
output stage input
output stage output
negative supply
positive supply
external power resistor
sawtooth generator trigger input
sawtooth generator output
zero crossing detector disable input
CC
=
being the common pin, isolation
⎛
⎜
⎜
⎜
⎝
⎛
⎝
-------------------------------------------------------------------- -
----------------------- -
Ds
2 V
DESCRIPTION
⋅
π
is the foward voltage
rms
Product Specification
IES5528
⎞
⎠
Rs
–
(
15.4
+
V
Ds
)
⎞
⎟
⎟
⎟
⎠
EE
A