U211B-MFPG3Y Atmel, U211B-MFPG3Y Datasheet - Page 7

• Manufacturer Part Number: U211B-MFPG3Y
• Description: IC PHASE CONTROL TACHO 16SOIC
• Manufacturer: Atmel

Specifications of U211B-MFPG3Y

• Applications: AC Motor Controller
• Number Of Outputs: 1
• Current - Output: 7.5mA
• Voltage - Supply: 14.6 V ~ 16.6 V
• Operating Temperature: -10°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 16-SOIC (3.9mm Width)
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Load: -
• Lead Free Status / Rohs Status: Compliant

7.1
7.2
7.3
4752B–INDCO–09/05
Pulse Blocking
Control Amplifier
Load Limitation
The output of pulses can be blocked by using pin 18 (standby operation) and the system reset
via the voltage monitor if V
output is released when V
Monitoring of the rotation can be carried out by connecting an RC network to pin 18. In the
event of a short or open circuit, the triac triggering pulses are cut off by the time delay which is
determined by R and C. The capacitor C is discharged via an internal resistance R
each charge transfer process of the f/V converter. If there are no more charge transfer pro-
cesses, C is charged up via R until the switch-off threshold is exceeded and the triac triggering
pulses are cut off. For operation without trigger pulse blocking or monitoring of the rotation,
pin 18 and pin 16 must be connected together.
Figure 7-1.
The integrated control amplifier (see
the set value (pin 11) with the instantaneous value on pin 10, and generates a regulating volt-
age on the output pin 12 (together with the external circuitry on pin 12). This pin always tries to
keep the actual voltage at the value of the set voltages. The amplifier has a transmittance of
typically 1000 µA/V and a bipolar current source output on pin 12 which operates with typically
±110 µA. The amplification and frequency response are determined by R
(can be left out). For open-loop operation, C
Pin 10 should be connected with pin 12 and pin 8 with pin 2. The phase angle of the triggering
pulse can be adjusted by using the voltage on pin 11. An internal limitation circuit prevents the
voltage on pin 12 from becoming more negative than V
The load limitation, with standard circuitry, provides full protection against overloading of the
motor. The function of load limiting takes account of the fact that motors operating at higher
speeds can safely withstand larger power dissipations than at lower speeds due to the
increased action of the cooling fan. Similarly, considerations have been made for short-term
overloads for the motor which are, in practice, often required. These behaviors are not damag-
ing and can be tolerated.
Operation Delay
18
18
R = 1 M
–1.5V, followed by a soft start such as after turn-on.
–1.25V. After cycling through the switching point hysteresis, the
Figure 10-17 on page
18
1
4
, C
17
2
5
, R
+
16
6
16
3
, R
C = 1 µF
+ 1V.
21) with differential input compares
7
, C
15
10V
4
7
, C
8
and R
11
7
, C
can be omitted.
7
, C
U211B
i
= 2 k with
8
and R
11
7