tb62719af TOSHIBA Semiconductor CORPORATION, tb62719af Datasheet - Page 25

• Manufacturer Part Number: tb62719af
• Description: 16ch Constant Current Drivers And Controller For Full-color Led Modules And Panels
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Block Diagram of Protection Circuit
Protection Circuit Function
Operating Chart (terminals for TESNA, ALARM1 and outputs OUT00 to OUT15)
Note: The internal operation of the TSD circuit is independent of the TSENA and
TSENA
X
X
X
X
X
X
When pins TSENA and RESET are High, the forced OFF mode by the TSD circuit can not be canceled.
RESET
H
H
H
L
L
L
(Open Drain)
(Open Drain)
LED TEST
ALARM1
ALARM2
RESET
TSENA
T
j
< = 120°C
⎯
⎯
⎯
⎯
○
○
Junction Temperature
Output-OFF condition is released and internal data is reset.
cancel
Pulse
120 < = T
TSD1
⎯
⎯
○
○
⎯
⎯
Continue one, open condition is
detected.
j
Release of output OFF on positive edge
TSD2
TSD1
140 < = T
TSD2
⎯
⎯
⎯
⎯
○
○
25
j
impedance
impedance
(low level)
(low level)
(low level)
(low level)
ALARM1
high
high
ON
ON
ON
ON
Output-open
detection
Output OFF
Output ON
Forced OFF
Forced OFF
OUT00 to
operation
OUT15
Normal
OFF
OFF
OFF
OUT00 to OUT15
Current Output
RESET
Constant-
16
Device reset
Outputs operate normally.
Device reset
ALARM1 goes Low, indicating a
rise in temperature. Outputs
operate normally.
Even after a reset, if the junction
temperature is high, outputs are
forced OFF.
ALARM1 goes Low, indicating a
rise in temperature. Outputs are
forced OFF.
pin voltage levels.
Function
TB62719AF
2004-05-12