TEA1751LT/N1 NXP Semiconductors, TEA1751LT/N1 Datasheet - Page 14

• Manufacturer Part Number: TEA1751LT/N1
• Description: AC-DC, PFC, FLYBACK, CNTRL, 16SOIC
• Manufacturer: NXP Semiconductors

Specifications of TEA1751LT/N1

• Input Voltage: 276V
• Output Current: 1.2A
• Output Voltage: 11V
• No. Of Outputs: 2
• Power Dissipation Pd: 600mW
• Voltage Regulator Case Style: SOIC
• No. Of Pins: 16
• Operating Temperature Range: -40°C To
• Supply Voltage Range: 21V To 23V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

NXP Semiconductors
TEA1751T_LT_2
Product data sheet
7.3.3 Current mode control (FBSENSE pin)
Current mode control is used for the flyback converter for its good line regulation.
The primary current is sensed by the FBSENSE pin across an external resistor and
compared with an internal control voltage.The internal control voltage is proportional to
the FBCTRL pin voltage, see
Fig 9.
(1) Start of new cycle at lowest drain voltage.
(2) Start of new cycle in a classical Pulse Width Modulation (PWM) system without valley detection.
Signals for valley switching
secondary
oscillator
stroke
valley
drain
Rev. 02 — 23 December 2009
primary
stroke
Figure
secondary
stroke
10.
TEA1751T; TEA1751LT
secondary
ringing
GreenChip III SMPS control IC
(2)
014aaa027
© NXP B.V. 2009. All rights reserved.
(1)
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