ssl1750 NXP Semiconductors, ssl1750 Datasheet - Page 15

• Manufacturer Part Number: ssl1750
• Description: Smps Control Ic For Led Drivers
• Manufacturer: NXP Semiconductors

NXP Semiconductors
SSL1750_1
Product data sheet
7.3.3 Current mode control (pin FBSENSE)
Current mode control is used for the flyback converter for its good line regulation.
The primary current is sensed by pin FBSENSE across an external resistor and compared
with an internal control voltage.The internal control voltage is proportional to the voltage
on pin FBCTRL.
Fig 10. Signals for valley switching
(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.
secondary
oscillator
stroke
valley
drain
Rev. 01 — 15 September 2008
primary
stroke
secondary
stroke
secondary
SMPS control IC for LED drivers
ringing
(2)
014aaa027
SSL1750
© NXP B.V. 2008. All rights reserved.
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