IC CTLR SYNC RECTIFIER 8SOIC

TEA1791AT/N1,118

Manufacturer Part NumberTEA1791AT/N1,118
DescriptionIC CTLR SYNC RECTIFIER 8SOIC
ManufacturerNXP Semiconductors
SeriesGreenChip™
TEA1791AT/N1,118 datasheet
 

Specifications of TEA1791AT/N1,118

Package / Case*Mounting Type*
Voltage - Supply8.5 V ~ 38 VOperating Temperature-20°C ~ 150°C
ModeDiscontinuous Conduction (DCM)Input / Supply Voltage (max)38 V
Input / Supply Voltage (min)8.5 VSupply Current0.95 mA
Operating Temperature Range- 40 C to + 150 CMounting StyleSMD/SMT
Maximum Operating Temperature+ 150 CMinimum Operating Temperature- 40 C
Output Current3 ALead Free Status / RoHS StatusLead free / RoHS Compliant
Frequency - Switching-Current - Startup-
Other names935290157118  
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NXP Semiconductors
V
SRSENSE
Secondary
V
Fig 3.
If the secondary stroke of the flyback converter is shorter than 0.93 μs (typical), the driver
output is disabled. This will guarantee stable operation for very low duty cycles. When the
secondary stroke increases above 0.99 μs (typical), the driver output is again enabled.
7.4 Supply management
All internal reference voltages are derived from a temperature compensated, on-chip
band gap circuit.
7.5 Driver
The driver circuit to the gate of the external power MOSFET has a typical source
capability of 250 mA and a typical sink capability of 2.7 A. This permits fast turn-on and
turn-off of the power MOSFET for efficient operation. The source stage is coupled to the
timer (see
small current (typical 5 mA) capable of keeping the driver output voltage at its level.
Typically, the time the driver source stage delivers the 250 mA is 100 ns shorter than the
minimum synchronous rectification active time (t
is limited to 10 V (typical). This high output voltage will drive all MOSFET brands to the
minimum on-state resistance.
During start-up conditions (V
voltage is actively pulled low.
TEA1791AT
Product data sheet
Primary
current
current
DRIVER
Synchronous rectification signals
Figure
1). When the timer has finished, the source capability is reduced to a
< V
CC
startup
All information provided in this document is subject to legal disclaimers.
Rev. 01 — 7 June 2010
TEA1791AT
GreenChip synchronous rectifier controller
).The output voltage of the driver
act(sr)(min)
) and undervoltage lockout the driver output
0 V
−12 mV
−55 mV
−310 mV
0 A
0 A
0 V
014aaa057
© NXP B.V. 2010. All rights reserved.
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