參數(shù)資料
型號(hào)： TK61220AQ4
廠商： TOKO INC
元件分類： 穩(wěn)壓器
英文描述： SWITCHING REGULATOR, QCC24
封裝： 4 X 4 MM, HQFN-24
文件頁(yè)數(shù)： 5/23頁(yè)
文件大小： 342K
代理商： TK61220AQ4
TK61220AQ4
GC3-N008B
Page 13
Pin
No
Pin
Description
Internal Equivalent Circuit
Description
8
DIM
8
VREF
This pin is the bias current dimming and PWM dimming
pin. Pull-down resistor (about 300k
) is built in. The FB
pin voltage changes in a constant ratio when a voltage
between 0V and 2V is applied to the DIM pin. The LED
current varies with the FB pin voltage. When the applied
voltages exceed 2.0V, the FB pin voltage becomes a fixed
0.5V. The FB voltage difference between FB1 and FB2 in
the fixed state is less than
±2.5% (±12.5mV).
9
CT
9
VREF
This pin is the capacitor connection pin for triangle
oscillator frequency setting. One side of a capacitor
connects with GND. Please use capacitors greater than
15pF. When the pin voltage becomes less than 0.3V, the
driver output turns Off.
10
RT
10
VREF
This pin is the resistor connection pin for triangle
oscillator frequency setting. One side of a resistor
connects with GND. Please use resistors greater than
8.2k
. Oscillator frequency is expressed in the following
equation by a combination of RT and CT. It must be
200kHz or more. fosc=1/((2×(CT+4pF)×RT)+160ns)
11
REF
11
VDD
This pin is the reference voltage VREF=2.5V output pin for
the outside supply.
12
DTC
12
VREF
This pin is the dead time control pin. The DTC pin
voltage is set by dividing the REF pin voltage by a
resistor.
13
PGOOD 2
13
VREF
This pin is the ch2 protection state output pin.
14
EAOUT 2
14
VREF
This pin is the ch2 error amplifier output pin.
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