TS19310 Datasheet, PDF (6/8 Pages) Taiwan Semiconductor Company, Ltd – Single-Stage PFC TRIAC Dimmable LED Driver

TS19310A/B
Single-Stage PFC
TRIAC Dimmable LED Driver
Pin 3: Current Sense
MOSFET current signal sensing for multiply, phase angle decode and current limit setting function.
Where:
ICS(Limit)  ^1.25
RS
 I_CS is the input current sense
 IC internal CS Pin 1.25V Over voltage level
 R_S is the sensing resistor connected between the MOSFET source and GND
Pin 4: Output
Gate drive for external MOSFET switch and has built-in gate clamp function.
Pin 5: V_CC
Power supply for the controller during normal operation. The controller will start up when VCC reaches 18V (typical)
and will shut-down when VCC voltage is below 9.5V (typical). A decoupling capacitor should be connected
between the VCC and GND pin as close as possible.
The TS19310 performs VCC over voltage protection though VCC pin. Once VCC pin exceeds 32V, TS19310 turns
off and latches the MOSFET until VCC goes below VCC_OFF.
Pin 6: DMG
The Output voltage is reflected by the auxiliary winding (N_A) voltage of Flyback transformer, the DMG pin can
sense output information to depart from start up voltage (V_{O_STR}) and protection voltage (V_{O_OVP}).
When DMG sense voltage under V_{O_STR}, the circuit will work on short circuit protection, f_STR=1/t_STR.
When DMG sense voltage over V_{O_OVP}, the circuit will work on over voltage protection, it will latch out off until V_CC
goes below V_{CC_OFF}.
VCC
OVP Protection (by DMG)
N_A
R_DMG1
VDMG_OVP  ^NS × VOVPS × ^{RDGM1  RDGM2}
NA
RDMG2
DMG
OVP Protection (by V_CC)
R_DMG2
C_DMG
VVCC _ OVP  ^NS × VOVPA
NA
Short Circuit Protection
VO _ Short  ^NS × VO _ STR × ^{RDMG1  RDMG2}
NA
RDMG2
Where:
● V_{DMG_OVP} is the output-over-voltage protection point
● V_OVPS is the over voltage protection signal
● V_{O_STR} is the start-up timer
● N_A is the number of auxiliary-winding turns
● N_S is the number of secondary-winding turns
6/8
Version: A14