TEA1742T/N1,118 NXP Semiconductors, TEA1742T/N1,118 Datasheet - Page 9

• Manufacturer Part Number: TEA1742T/N1,118
• Description: IC CTRLR GREENCHIP PFC 8-SOIC
• Manufacturer: NXP Semiconductors
• Series: GreenChip™r

Specifications of TEA1742T/N1,118

• Mode: Continuous Conduction (CCM)
• Frequency - Switching: 125kHz
• Current - Startup: 60µA
• Voltage - Supply: 10.6 V ~ 38 V
• Operating Temperature: -20°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935288647118

NXP Semiconductors
8. Limiting values
TEA1742T_1
Objective data sheet
7.2.10 PFC open-loop protection (VOSENSE pin)
7.2.11 Driver (pin PFCDRIVER)
7.2.7 Overcurrent protection (PFCSENSE pin)
7.2.8 Mains undervoltage lockout / brownout protection (VINSENSE pin)
7.2.9 Overvoltage protection (VOSENSE pin)
The maximum peak current is limited cycle-by-cycle by sensing the voltage across an
external sense resistor, R
measured via the PFCSENSE pin.
To prevent the PFC from operating at very low mains input voltages, the voltage on the
VINSENSE pin is sensed continuously. As soon as the voltage on this pin drops below the
V
The voltage on pin VINSENSE is clamped to a minimum value,
V
restored after a mains dropout.
To prevent output overvoltage during load steps and mains transients, an overvoltage
protection circuit is built in.
As soon as the voltage on the VOSENSE pin exceeds the V
the power factor correction circuit is inhibited. Switching of the PFC recommences as
soon as the VOSENSE pin voltage drops below the V
When the resistor between pin VOSENSE and ground is open, the overvoltage protection
is also triggered.
The power factor correction circuit does not start switching until the voltage on the
VOSENSE pin is above the V
and VOSENSE short situations.
The driver circuit to the gate of the power MOSFET has a current sourcing capability of
typically 500 (TBF) mA and a current sink capability of typically 1.2 (TBF) A. This permits
fast turn-on and turn-off of the power MOSFET for efficient operation.
Table 3.
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol
Voltages
V
V
V
V
V
V
stop(VINSENSE)
start(VINSENSE)
CC
PFCCOMP
VINSENSE
VOSENSE
PFCAUX
PFCSENSE
Limiting values
Parameter
supply voltage
voltage on pin PFCCOMP
voltage on pin VINSENSE
voltage on pin VOSENSE
voltage on pin PFCAUX
voltage on pin PFCSENSE
level, switching of the PFC is stopped.
+ V
pu(VINSENSE)
Rev. 01 — 10 February 2009
SENSE1
th(ol)(VOSENSE)
, for a fast restart as soon as the mains input voltage is
, on the source of the external MOSFET. The voltage is
Conditions
current limited
level. This protects the circuit from open-loop
OVP(VOSENSE)
ovp(VOSENSE)
GreenChip PFC controller
Min
0.4
0.4
0.4
0.4
25
0.4
level again.
TEA1742T
© NXP B.V. 2009. All rights reserved.
level, switching of
Max
+38
+5
+5
+5
+25
+5
Unit
V
V
V
V
V
V
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