HV9985 Datasheet, PDF (4/16 Pages) Supertex, Inc – Three-Channel, Closed-Loop, Switch Mode LED Driver IC

HV9985
Electrical Characteristics (The * denotes the specifications which apply over the full operating ambient temperature range
0^OC<T_A<+85^OC, otherwise the specifications are at T_A = 25^OC. V_IN = 24V, V_DD1 = V_DD2 = V_DD3 = V_DD unless otherwise noted.)
Sym Parameter
Min Typ Max Units Conditions
Internal Transconductance Opamp (Gm1, Gm2 and Gm3)
GB
Gain bandwidth product
# - 1.0 - MHz 75pF capacitance at COMP pin
A_V
Open loop DC gain
- 65
-
-
dB Output open
V_CM
Input common-mode range
# -0.3 - 3.0 V ---
V_O
G_M
V_OFFSET
Output voltage range
Transconductance
Input offset voltage
#-
-
V_DD
- ---
- 500 625 750 μA/V ---
- -5.0 - 5.0 mV ---
I_BIAS
Input bias current
# - 0.5 1.0 nA ---
R_RATIO Resistor divider ratio (∆V_CS/∆V_COMP) #
-
0.11
-
- ---
External Clock Input
f_OSC1
Oscillator frequency
- - 500
-
kHz F_CLOCK = 6.0MHz
K_SW
Oscillator divider ratio
GATE1-GATE2 phase delay
P_HI1
GATE1-GATE3 phase delay
# - 12.0 -
# - 120 -
# - 240 -
- ---
O _---
O _---
T_OFF,MIN Minimum CLOCK low time
T_ON,MIN Minimum CLOCK high time
V_CLOCK,HI
V_CLOCK,LO
CLOCK input high
CLOCK input low
Oscillator
F_osc1
Switching frequency (common for
F_osc2
all channels)
F_osc
Switching frequency range
Disconnect Driver (FLT1, FLT2 and FLT3)
T_RISE,FAULT Fault output rise time
T_FALL,FAULT Fault output fall time
Short Circuit Protection (all three channels)
T_BLANK,SC Blanking time
G_SC
Gain for short circuit comparator
V_omin
Minimum current limit threshold
T_OFF
Propagation time for short circuit
detection
# 50
-
-
# 50
-
-
* 2.0 -
-
*-
- 0.8
- 110
- 440
#-
125 140
500 560
- 1000
*-
*-
- 300
- 200
* 400 - 700
- 1.85 2.0 2.15
- 0.15 - 0.25
*-
- 250
ns ---
ns ---
V ---
V ---
kHz RT = 400kΩ
kHz RT = 100kΩ
kHz ---
ns 500pF capacitor at FLT pin
ns 500pF capacitor at FLT pin
ns ---
- ---
V REF = GND
ns FDBK = 2 • REF + 0.1V
SKIP timer
I_HC,SOURCE
Current source at SKIP pin used for
hiccup mode protection
-
-
5.0
-
μA ---
V_SKIP ΔVoltage swing at SKIP pin
# - 1.5 -
V ---
# Denotes specifications guaranteed by design.
* The specifications which apply over the full operating temperature range at 0^OC < T_A < +85^OC are guaranteed by design and characterization.
Doc.# DSFP-HV9985
C051513
Supertex inc.
4
www.supertex.com