TEA1791T/N1,118 NXP Semiconductors, TEA1791T/N1,118 Datasheet - Page 4

• Manufacturer Part Number: TEA1791T/N1,118
• Description: IC CTRLR GREENCHIP SYNC 8-SOIC
• Manufacturer: NXP Semiconductors
• Series: GreenChip™r

Specifications of TEA1791T/N1,118

• Package / Case: 8-SOIC (3.9mm Width)
• Mode: Discontinuous Conduction (DCM)
• Voltage - Supply: 8.5 V ~ 38 V
• Operating Temperature: -20°C ~ 150°C
• Mounting Type: Surface Mount
• Output Voltage: 10 V
• Supply Current: 0.65 mA
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Frequency - Switching: -
• Current - Startup: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 935287392118

NXP Semiconductors
TEA1791T
Product data sheet
7.4 Supply management
7.5 Driver
If the secondary stroke of the flyback converter is shorter than 2 μs (typical), the driver
output is disabled. This will guarantee stable operation for very low duty cycles. When the
secondary stroke increases above 2.2 μs (typical), the driver output is again enabled.
All internal reference voltages are derived from a temperature compensated, on-chip
band gap circuit.
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 output voltage of the driver 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.
Fig 3.
Secondary
V
SRSENSE
V
Primary
DRIVER
current
current
Synchronous rectification signals
All information provided in this document is subject to legal disclaimers.
Rev. 02 — 7 June 2010
CC
< V
startup
) and undervoltage lockout the driver output
GreenChip synchronous rectifier controller
TEA1791T
© NXP B.V. 2010. All rights reserved.
014aaa057
0 V
−12 mV
−55 mV
−310 mV
0 A
0 A
0 V
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