HV9910 Ver la hoja de datos (PDF) - Supertex Inc
Número de pieza
componentes Descripción
Fabricante
HV9910 Datasheet PDF : 8 Pages
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HV9910
Symbol Parameter
tDELAY
tRISE
tFALL
Delay from CS trip to GATE lo
GATE output rise time
GATE output fall time
Min
-
-
-
Typ
-
30
30
Max
300
50
50
Units
ns
ns
ns
Conditions
VIN = 12V, VLD = 0.15,
VCS = 0 to 0.22V after TBLANK
CGATE = 500pF
CGATE = 500pF
Pinout
Pin
SOIC-16
SOIC-8
Description
VIN
1
CS
4
1
Input voltage 8V to 450V DC
2
Senses LED string current
GND
5
3
Device ground
GATE
8
4
Drives the gate of the external MOSFET
PWM_D
9
5
Low Frequency PWM Dimming pin, also Enable input. Internal
100kΩ pull-down to GND
VDD
12
Internally regulated supply voltage (7.5V nominal). Can supply
6
up to 1mA for external circuitry. A sufficient storage capacitor is
used to provide storage when the rectified AC input is near the
zero crossings.
LD
13
7
Linear dimming by changing the current limit threshold at current
sense comparator
RT
14
8
Oscillator control. A resistor connected between this pin and
ground sets the PWM frequency.
No Connects (NC) are not internally connected and may be used for pass-thru PCB traces.
Block Diagram & Typical Applications
VIN
VIN
REG
7.5V
RT
OSC
VDD
VDD
250mV
CM
LD
CM
S
R
Q
GATE
CS
PWM_D
100k
HV9910
GND
3
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