tea1553t NXP Semiconductors, tea1553t Datasheet - Page 16

• Manufacturer Part Number: tea1553t
• Description: Tea1553t Greenchip Ii Smps Control Ic
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TEA1553T_1
Product data sheet
7.21 Driver
The driver circuit to the gate of the power MOSFET has a current sourcing capability of
typically 170 mA and a current sink capability of typically 700 mA. This permits fast
turning on and off of the power MOSFET for efficient operation.
A low driver source current has been chosen to limit the V/ t at switch-on. This reduces
the Electromagnetic Interference (EMI) and also limits the current spikes across R
Fig 13. Soft start-up
0.5 V
Rev. 01 — 3 July 2007
startup
overcurrent
protection
voltage
I startup(soft)
DRIVER
ISENSE
R SS
C SS
GreenChip II SMPS control IC
014aaa012
R sense
TEA1553T
© NXP B.V. 2007. All rights reserved.
sense
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