High Performance, OLED + LED Driver for Dual Panel
The RT9273 is a high efficiency step-up DC-DC converter
specifically designed for dual panel mobile phone
According to SP status, RT9273 can either regulates
output current flowing through series-connected LEDs or
regulate output voltage applying to OLED with a common
output LC filter. This along with compact VDFN-10L 3x3
package and high switching frequency allows less part
count and smaller external components for space and cost
Pulling low EN pin shuts down the chip and reduces the
supply current to less than 1μA. The EN pin also accepts
PWM signal for LED brightness dimming control. The
averaged LED current is well proportional to the duty cycle
of the PWM signal. The internal soft start reduces inrush
current during EN turning on or PWM dimming control.
Other features include OVP, OCP and OTP. OVP prevents
the damages in case of feedback loop open.
QV : VDFN-10L 3x3 (V-Type)
Operating Temperature Range
P : Pb Free with Commercial Standard
G : Green (Halogen Free with Commer-
Richtek Pb-free and Green products are :
`RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
`Suitable for use in SnPb or Pb-free soldering processes.
`100% matte tin (Sn) plating.
z Lion-Battery operating Range : 2.7V to 4.5V
z Maximum Output Voltage Up to 16V
z Share One Set of Inductor and Schottky Diode for
z Programmable Dimming Function by EN pin with
200Hz to 1kHz
z Internal Soft-Start Function to Avoid PWM Dimming
z Zero Shut Down Supply Current
z Complete Protection : OVP, OCP, OTP and SS
z RoHS Compliant and 100% Lead (Pb)-Free
z Dual panel mobile phone, with LED backlight
11 6 FB1
For marking information, contact our sales representative
directly or through a Richtek distributor located in your
area, otherwise visit our website for detail.
DS9273-09 August 2007