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參數(shù)資料
| 型號： | U2010B-XY |
| 廠商： | ATMEL CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | AC MOTOR CONTROLLER, 0.03 A, PDIP16 |
| 封裝： | LEAD FREE, DIP-16 |
| 文件頁數(shù)： | 13/18頁 |
| 文件大?。?/td> | 1228K |
| 代理商： | U2010B-XY |
4
4766C–INDCO–04/10
U2010B
3.
General Description
3.1
Mains Supply
The U2010B contains voltage limiting and can be connected with the mains supply via D
1 and
R
1. Supply voltage – between pin 10 and pin 11 – is smoothed by C1.
In the case of V
6 ≤ 70% of the overload threshold voltage, pins 11 and 12 are connected inter-
nally whereby V
sat ≤ 1.2 V. When V6
≥ V
T70 , the supply current flows across D3.
The series resistance R
1 can be calculated as follows:
where:
V
mains
= Mains supply voltage
V
Smax
= Maximum supply voltage
I
tot
= Total current consumption = I
Smax + Ix
I
Smax
= Maximum current consumption of the IC
I
x
= Current consumption of the external components
3.2
Voltage Monitoring
When the voltage is built up, uncontrolled output pulses are avoided by internal voltage monitor-
ing. Apart from that, all latches in the circuit (phase control, load limit regulation) are reset and
the soft-start capacitor is short-circuited. This guarantees a specified start-up behavior each time
the supply voltage is switched on or after short interruptions of the mains supply. Soft start is ini-
tiated after the supply voltage has been built up. This behavior guarantees a gentle start-up for
the motor and automatically ensures the optimum run-up time.
3.3
Phase Control
The function of the phase control is mainly identical to the well-known IC U211B. The phase
angle of the trigger pulse is derived by comparing the ramp voltage V
3, which is mains-synchro-
nized by the voltage detector, with the set value on the control input, pin 4. The slope of the
ramp is determined by C
and its charging current I. The charging current can be varied using
R
at pin 14. The maximum phase angle, α
max, can also be adjusted by using R (minimum cur-
rent flow angle
min), see Figure 7-1 on page 10.
When the potential on pin 3 reaches the set point level of pin 4, a trigger pulse width, t
p, is deter-
mined from the value of C
(t
p = 9 s/nF). At the same time, a latch is set with the output pulse
as long as the automatic retriggering has not been activated. When this happens, no more
pulses can be generated in that half cycle. The control input at pin 4 (with respect to pin 10) has
an active range from V
8 to -1 V. When V4 = V8, then the phase angle is at its maximum, αmax, i.e.,
the current flow angle is minimum. The minimum phase angle,
α
min, is set with V4 ≥ -1 V.
R
1max
V
mains
V
Smax
–
2I
tot
×
--------------------------------------
=
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