BW9910 Datasheet, PDF (4/14 Pages) Bruckewell Technology LTD – High Brightness LED Driver

BW9910/A High Brightness LED Driver
Electrical Characteristics
(Over recommended operating conditions unless otherwise specified. T_A +25°C)
Parameter
Symbol Min.
Typ.
Max. Unit
Condition
15
Input DC supply voltage range V_INDC
20
500
BW9910
V
DC input voltage
500
BW9910A
Shut down mode supply
current
I_INSD
0.5
0.65
1.0
1.20
mA
BW9910 _{Pin PWM_D to GND,}
BW9910A ^{VIN VINDC(MIN) (Note 3)}
Internally regulated voltage
7.0
7.5
8.0
BW9910 ^VIN ^VINDC(MIN) ^{~ 500V}
V_DD
V
(Note 3)_{, lDD(EXT) 0, GATE}
9.5
10.0
11.0
BW9910A _{pin open}
V_DD current available for
external circuitry ^{(Note 4)}
I_DD(EXT)
1.0
BW9910
mA
V_IN V_INDC(MIN) ~ 100V
(Note 3)
BW9910A
V_DD under voltage lockout
threshold
6.4
6.7
7.0
BW9910
V_UVLO
V
V_DD rising
8.4
9.0
9.6
BW9910A
V_DD under voltage lockout
hysteresis
∆V_UVLO
500
650
BW9910
mV
V_DD falling
BW9910A
PWM_D pull-down resistance R_{PWM_D}
150
200
250
kΩ V_{PWM_D} 5V
Current sensing pull in
threshold voltage
V_CS
225
250
275
mV
Full ambient temperature range
(Note 5)
GATE high output voltage
V_GATE(HI) V_DD - 0.3
V_DD
V I_OUT 10mA
GATE low output voltage
V_GATE(LO)
0
0.3
V I_OUT -10mA
Oscillator frequency
f_OSC1
20
f_OSC2
80
Maximum oscillator PWM duty
cycle
D_MAX(HF)
26
32
kHz ^{ROSC 1MΩ}
100
120
R_OSC 226kΩ
100
%
f_PWM(HF) 25kHz, at GATE, CS tie to
GND.
Linear dimming pin voltage
range
V_LD
0
250
mV
Full ambient temperature range
(Note 5)_{, VIN 20V}
Current sensing blanking
interval
t_BLANK
160
250
440
ns V_CS 0.5V
Delay from CS trip to GATE
low
GATE output rise time
t_DELAY
t_RISE
300
ns
V_IN 20V, V_LD 0.15V, V_CS 0V ~
0.22V after t_BLANK
30
50
ns C_GATE 500pF
GATE output fall time
t_FALL
30
50
ns C_GATE 500pF
Thermal shut down
T_SD
150
°C
Thermal shut down hysteresis ∆T_SD
50
°C
Note :
3. VINDC(MIN) for the BW9910 is 15V and for the BW9910A it is 20V.
4. Also limited by package power dissipation limit, whichever is lower.
5. Full ambient temperature range for BW9910 MST and BW9910A MST is -40 to +85°C; for BW9910 MPT and BW9910A MPT is -
40 to +105°C.
© 2012 Bruckewell Technology Corp., Ltd.
4
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